diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/ClientLibraryPackageInfoComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/ClientLibraryPackageInfoComposer.java
index 5bd24bdbd0f0..25e0bf8cbdb6 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/ClientLibraryPackageInfoComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/ClientLibraryPackageInfoComposer.java
@@ -105,7 +105,7 @@ private static CommentStatement createPackageInfoJavadoc(GapicContext context) {
           ServiceClientHeaderSampleComposer.composeClassHeaderSample(
               service, clientType, context.resourceNames(), context.messages());
       javaDocCommentBuilder.addSampleCode(
-          SampleCodeWriter.writeInlineSample(packageInfoSampleCode.body()));
+          SampleCodeWriter.writeInlineSample(packageInfoSampleCode));
     }
 
     return CommentStatement.withComment(javaDocCommentBuilder.build());
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/comment/CommentComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/comment/CommentComposer.java
index 498320731fa9..7e1433d03467 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/comment/CommentComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/comment/CommentComposer.java
@@ -19,6 +19,7 @@
 import com.google.api.generator.engine.ast.LineComment;
 import com.google.api.generator.engine.ast.Statement;
 import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableList;
 import java.util.Arrays;
 import java.util.Calendar;
 import java.util.List;
@@ -63,7 +64,7 @@ public class CommentComposer {
       CommentStatement.withComment(
           LineComment.withComment(AUTO_GENERATED_METHOD_DISCLAIMER_STRING));
 
-  public static final List<Statement> AUTO_GENERATED_SAMPLE_COMMENT =
+  public static final List<Statement> AUTO_GENERATED_SAMPLE_COMMENT_BASE =
       Arrays.asList(
           CommentStatement.withComment(
               LineComment.withComment(
@@ -80,6 +81,22 @@ public class CommentComposer {
               LineComment.withComment(
                   "https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library")));
 
+  public static final List<Statement> CLIENT_LIFECYCLE_COMMENT =
+      Arrays.asList(
+          CommentStatement.withComment(
+              LineComment.withComment(
+                  "- The samples create a client that can be re-used for multiple requests\n"
+                      + " and are expected to be long-lived.\n"
+                      + " The clients should be resource managed properly and eventually closed.\n"
+                      + "For more information on client lifecycle, see\n"
+                      + "https://docs.cloud.google.com/java/docs/client-lifecycle")));
+
+  public static final List<Statement> AUTO_GENERATED_SAMPLE_COMMENT =
+      ImmutableList.<Statement>builder()
+          .addAll(AUTO_GENERATED_SAMPLE_COMMENT_BASE)
+          .addAll(CLIENT_LIFECYCLE_COMMENT)
+          .build();
+
   // This environment variable is mainly used to override the current year to a fixed year in tests
   // so we don't have to update golden tests every year.
   // This does not work for golden integration tests that are generated from Bazel rules. Because
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceClientClassComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceClientClassComposer.java
index 913ffd0f5c75..f502176e95df 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceClientClassComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceClientClassComposer.java
@@ -233,9 +233,9 @@ protected List<CommentStatement> createClassHeaderComments(
     return ServiceClientCommentComposer.createClassHeaderComments(
         methodVariantsForClientHeader,
         service,
-        SampleCodeWriter.writeInlineSample(classMethodSampleCode.body()),
-        SampleCodeWriter.writeInlineSample(credentialsSampleCode.body()),
-        SampleCodeWriter.writeInlineSample(endpointSampleCode.body()),
+        SampleCodeWriter.writeInlineSample(classMethodSampleCode),
+        SampleCodeWriter.writeInlineSample(credentialsSampleCode),
+        SampleCodeWriter.writeInlineSample(endpointSampleCode),
         null,
         null,
         null);
@@ -797,7 +797,7 @@ private static List<MethodDefinition> createMethodVariants(
       if (methodSample.isPresent()) {
         samples.add(methodSample.get());
         methodDocSample =
-            Optional.of(SampleCodeWriter.writeInlineSample(methodSample.get().body()));
+            Optional.of(SampleCodeWriter.writeInlineSample(methodSample.get()));
       }
 
       MethodDefinition.Builder methodVariantBuilder =
@@ -876,7 +876,7 @@ private static MethodDefinition createMethodDefaultMethod(
     if (defaultMethodSample.isPresent()) {
       samples.add(defaultMethodSample.get());
       defaultMethodDocSample =
-          Optional.of(SampleCodeWriter.writeInlineSample(defaultMethodSample.get().body()));
+          Optional.of(SampleCodeWriter.writeInlineSample(defaultMethodSample.get()));
     }
 
     MethodInvocationExpr callableMethodExpr =
@@ -1043,7 +1043,7 @@ private static MethodDefinition createCallableMethod(
     Optional<String> sampleDocCode = Optional.empty();
     if (sampleCode.isPresent()) {
       samples.add(sampleCode.get());
-      sampleDocCode = Optional.of(SampleCodeWriter.writeInlineSample(sampleCode.get().body()));
+      sampleDocCode = Optional.of(SampleCodeWriter.writeInlineSample(sampleCode.get()));
     }
 
     MethodDefinition.Builder methodDefBuilder = MethodDefinition.builder();
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceSettingsClassComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceSettingsClassComposer.java
index e117097b1094..c6f40e9a8b13 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceSettingsClassComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceSettingsClassComposer.java
@@ -30,6 +30,7 @@
 import com.google.api.gax.rpc.StubSettings;
 import com.google.api.gax.rpc.TransportChannelProvider;
 import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.generator.gapic.composer.comment.CommentComposer;
 import com.google.api.generator.engine.ast.AnnotationNode;
 import com.google.api.generator.engine.ast.CastExpr;
 import com.google.api.generator.engine.ast.ClassDefinition;
@@ -169,7 +170,7 @@ private static List<CommentStatement> createClassHeaderComments(
     Optional<String> docSampleCode = Optional.empty();
     if (sampleCode.isPresent()) {
       samples.add(sampleCode.get());
-      docSampleCode = Optional.of(SampleCodeWriter.writeInlineSample(sampleCode.get().body()));
+      docSampleCode = Optional.of(SampleCodeWriter.writeInlineSample(sampleCode.get(), CommentComposer.AUTO_GENERATED_SAMPLE_COMMENT_BASE));
     }
     // Create a sample for a LRO method using LRO-specific RetrySettings, if one exists in the
     // service.
@@ -188,7 +189,7 @@ private static List<CommentStatement> createClassHeaderComments(
     if (lroSampleCode.isPresent()) {
       samples.add(lroSampleCode.get());
       lroDocSampleCode =
-          Optional.of(SampleCodeWriter.writeInlineSample(lroSampleCode.get().body()));
+          Optional.of(SampleCodeWriter.writeInlineSample(lroSampleCode.get(), CommentComposer.AUTO_GENERATED_SAMPLE_COMMENT_BASE));
     }
 
     return SettingsCommentComposer.createClassHeaderComments(
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceStubSettingsClassComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceStubSettingsClassComposer.java
index 698fd50a2982..be4dc71d9982 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceStubSettingsClassComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceStubSettingsClassComposer.java
@@ -14,6 +14,7 @@
 
 package com.google.api.generator.gapic.composer.common;
 
+import com.google.api.generator.gapic.composer.comment.CommentComposer;
 import com.google.api.MonitoredResourceDescriptor;
 import com.google.api.core.ApiFunction;
 import com.google.api.core.ApiFuture;
@@ -459,7 +460,7 @@ private static List<CommentStatement> createClassHeaderComments(
     Optional<String> docSampleCode = Optional.empty();
     if (sampleCode.isPresent()) {
       samples.add(sampleCode.get());
-      docSampleCode = Optional.of(SampleCodeWriter.writeInlineSample(sampleCode.get().body()));
+      docSampleCode = Optional.of(SampleCodeWriter.writeInlineSample(sampleCode.get(), CommentComposer.AUTO_GENERATED_SAMPLE_COMMENT_BASE));
     }
     // Create a sample for a LRO method using LRO-specific RetrySettings, if one exists in the
     // service.
@@ -478,7 +479,7 @@ private static List<CommentStatement> createClassHeaderComments(
     if (lroSampleCode.isPresent()) {
       samples.add(lroSampleCode.get());
       lroDocSampleCode =
-          Optional.of(SampleCodeWriter.writeInlineSample(lroSampleCode.get().body()));
+          Optional.of(SampleCodeWriter.writeInlineSample(lroSampleCode.get(), CommentComposer.AUTO_GENERATED_SAMPLE_COMMENT_BASE));
     }
 
     return SettingsCommentComposer.createClassHeaderComments(
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/grpcrest/ServiceClientClassComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/grpcrest/ServiceClientClassComposer.java
index 3710f6949221..e63d29c9dc7d 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/grpcrest/ServiceClientClassComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/grpcrest/ServiceClientClassComposer.java
@@ -75,10 +75,10 @@ protected List<CommentStatement> createClassHeaderComments(
     return ServiceClientCommentComposer.createClassHeaderComments(
         grpcRpcsToJavaMethodNames,
         service,
-        SampleCodeWriter.writeInlineSample(classMethodSampleCode.body()),
-        SampleCodeWriter.writeInlineSample(credentialsSampleCode.body()),
-        SampleCodeWriter.writeInlineSample(endpointSampleCode.body()),
-        SampleCodeWriter.writeInlineSample(transportSampleCode.body()),
+        SampleCodeWriter.writeInlineSample(classMethodSampleCode),
+        SampleCodeWriter.writeInlineSample(credentialsSampleCode),
+        SampleCodeWriter.writeInlineSample(endpointSampleCode),
+        SampleCodeWriter.writeInlineSample(transportSampleCode),
         "gRPC",
         "REST (HTTP1.1/JSON)");
   }
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SampleCodeWriter.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SampleCodeWriter.java
index 8a12e14a97cd..91d1f7b35211 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SampleCodeWriter.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SampleCodeWriter.java
@@ -30,10 +30,22 @@ public static String writeInlineSample(List<Statement> statements) {
     return write(SampleComposer.composeInlineSample(statements));
   }
 
+  public static String writeInlineSample(Sample sample) {
+    return write(SampleComposer.composeInlineSample(sample));
+  }
+
+  public static String writeInlineSample(Sample sample, List<Statement> sampleComment) {
+    return write(SampleComposer.composeInlineSample(sample, sampleComment));
+  }
+
   public static String writeExecutableSample(Sample sample, String packkage) {
     return write(SampleComposer.composeExecutableSample(sample, packkage));
   }
 
+  public static String writeExecutableSample(Sample sample, String packkage, List<Statement> sampleComment) {
+    return write(SampleComposer.composeExecutableSample(sample, packkage, sampleComment));
+  }
+
   @VisibleForTesting
   public static String write(Statement... statement) {
     return write(Arrays.asList(statement));
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SampleComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SampleComposer.java
index 86eb187fd17b..839dca1a9fbd 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SampleComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SampleComposer.java
@@ -41,15 +41,27 @@ static List<Statement> composeInlineSample(List<Statement> sampleBody) {
     return bodyWithComment(CommentComposer.AUTO_GENERATED_SAMPLE_COMMENT, sampleBody);
   }
 
+  static List<Statement> composeInlineSample(Sample sample) {
+    return composeInlineSample(sample, CommentComposer.AUTO_GENERATED_SAMPLE_COMMENT);
+  }
+
+  static List<Statement> composeInlineSample(Sample sample, List<Statement> sampleComment) {
+    return bodyWithComment(sampleComment, sample.body());
+  }
+
   //  "Executable" meaning it includes the necessary code to execute java code,
   //  still may require additional configuration to actually execute generated sample code
   static ClassDefinition composeExecutableSample(Sample sample, String pakkage) {
+    return composeExecutableSample(sample, pakkage, CommentComposer.AUTO_GENERATED_SAMPLE_COMMENT);
+  }
+
+  static ClassDefinition composeExecutableSample(Sample sample, String pakkage, List<Statement> sampleComment) {
     return createExecutableSample(
         sample.fileHeader(),
         pakkage,
         sample.name(),
         sample.variableAssignments(),
-        bodyWithComment(CommentComposer.AUTO_GENERATED_SAMPLE_COMMENT, sample.body()),
+        bodyWithComment(sampleComment, sample.body()),
         sample.regionTag());
   }
 
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientCallableMethodSampleComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientCallableMethodSampleComposer.java
index 342fab52ad16..36d5eb005b9e 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientCallableMethodSampleComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientCallableMethodSampleComposer.java
@@ -402,14 +402,11 @@ public static Sample composeLroCallableMethod(
             .setIsAsynchronous(true)
             .setOverloadDisambiguation("LRO")
             .build();
-    List<Statement> body =
-        Arrays.asList(
-            TryCatchStatement.builder()
-                .setTryResourceExpr(
-                    SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr))
-                .setTryBody(bodyStatements)
-                .setIsSampleCode(true)
-                .build());
+    List<Statement> body = new ArrayList<>();
+    body.add(
+        ExprStatement.withExpr(
+            SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr)));
+    body.addAll(bodyStatements);
     return Sample.builder().setBody(body).setRegionTag(regionTag).build();
   }
 
@@ -524,14 +521,11 @@ public static Sample composePagedCallableMethod(
             .setBody(Arrays.asList(lineCommentStatement))
             .build();
     bodyStatements.add(repeatedResponseForStatement);
-    List<Statement> body =
-        Arrays.asList(
-            TryCatchStatement.builder()
-                .setTryResourceExpr(
-                    SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr))
-                .setTryBody(bodyStatements)
-                .setIsSampleCode(true)
-                .build());
+    List<Statement> body = new ArrayList<>();
+    body.add(
+        ExprStatement.withExpr(
+            SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr)));
+    body.addAll(bodyStatements);
 
     RegionTag regionTag =
         RegionTag.builder()
@@ -591,14 +585,11 @@ public static Sample composeRegularCallableMethod(
       regionTag = unaryOrLroCallable.regionTag();
     }
 
-    List<Statement> body =
-        Arrays.asList(
-            TryCatchStatement.builder()
-                .setTryResourceExpr(
-                    SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr))
-                .setTryBody(bodyStatements)
-                .setIsSampleCode(true)
-                .build());
+    List<Statement> body = new ArrayList<>();
+    body.add(
+        ExprStatement.withExpr(
+            SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr)));
+    body.addAll(bodyStatements);
     return Sample.builder().setBody(body).setRegionTag(regionTag).build();
   }
 
@@ -653,14 +644,11 @@ public static Sample composeStreamCallableMethod(
       regionTag = streamClient.regionTag();
     }
 
-    List<Statement> body =
-        Arrays.asList(
-            TryCatchStatement.builder()
-                .setTryResourceExpr(
-                    SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr))
-                .setTryBody(bodyStatements)
-                .setIsSampleCode(true)
-                .build());
+    List<Statement> body = new ArrayList<>();
+    body.add(
+        ExprStatement.withExpr(
+            SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr)));
+    body.addAll(bodyStatements);
     return Sample.builder().setBody(body).setRegionTag(regionTag).build();
   }
 
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientHeaderSampleComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientHeaderSampleComposer.java
index c4e38e24a388..386c0e31d588 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientHeaderSampleComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientHeaderSampleComposer.java
@@ -135,14 +135,11 @@ public static Sample composeShowcaseMethodSample(
       regionTag = unaryRpc.regionTag();
     }
 
-    List<Statement> body =
-        Arrays.asList(
-            TryCatchStatement.builder()
-                .setTryResourceExpr(
-                    SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr))
-                .setTryBody(bodyStatements)
-                .setIsSampleCode(true)
-                .build());
+    List<Statement> body = new ArrayList<>();
+    body.add(
+        ExprStatement.withExpr(
+            SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr)));
+    body.addAll(bodyStatements);
     return Sample.builder().setBody(body).setRegionTag(regionTag).build();
   }
 
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientMethodSampleComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientMethodSampleComposer.java
index 311ebab5ac30..b94f455f27f7 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientMethodSampleComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientMethodSampleComposer.java
@@ -59,14 +59,11 @@ public static Sample composeEmptyServiceSample(TypeNode clientType, Service serv
     RegionTag regionTag =
         RegionTag.builder().setServiceName(service.name()).setRpcName("emtpy").build();
 
-    List<Statement> body =
-        Arrays.asList(
-            TryCatchStatement.builder()
-                .setTryResourceExpr(
-                    SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr))
-                .setTryBody(bodyStatements)
-                .setIsSampleCode(true)
-                .build());
+    List<Statement> body = new ArrayList<>();
+    body.add(
+        ExprStatement.withExpr(
+            SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr)));
+    body.addAll(bodyStatements);
     return Sample.builder().setBody(body).setRegionTag(regionTag).setIsCanonical(true).build();
   }
 
@@ -127,14 +124,11 @@ public static Sample composeCanonicalSample(
       regionTag = unaryRpc.regionTag();
     }
 
-    List<Statement> body =
-        Arrays.asList(
-            TryCatchStatement.builder()
-                .setTryResourceExpr(
-                    SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr))
-                .setTryBody(bodyStatements)
-                .setIsSampleCode(true)
-                .build());
+    List<Statement> body = new ArrayList<>();
+    body.add(
+        ExprStatement.withExpr(
+            SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr)));
+    body.addAll(bodyStatements);
     return Sample.builder().setBody(body).setRegionTag(regionTag).setIsCanonical(true).build();
   }
 
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SettingsSampleComposer.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SettingsSampleComposer.java
index 57d396847e34..b8e8d70b74bb 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SettingsSampleComposer.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/samplecode/SettingsSampleComposer.java
@@ -243,7 +243,12 @@ public static Optional<Sample> composeSettingsSample(
             .setServiceName(classType.reference().name())
             .setRpcName(methodNameOpt.get())
             .build();
-    return Optional.of(Sample.builder().setBody(statements).setRegionTag(regionTag).build());
+    return Optional.of(
+        Sample.builder()
+            .setBody(statements)
+            .setRegionTag(regionTag)
+
+            .build());
   }
 
   public static Optional<Sample> composeLroSettingsSample(
@@ -434,6 +439,11 @@ public static Optional<Sample> composeLroSettingsSample(
             .setServiceName(classType.reference().name())
             .setRpcName(methodNameOpt.get())
             .build();
-    return Optional.of(Sample.builder().setBody(statements).setRegionTag(regionTag).build());
+    return Optional.of(
+        Sample.builder()
+            .setBody(statements)
+            .setRegionTag(regionTag)
+
+            .build());
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/model/Sample.java b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/model/Sample.java
index 27a999853add..dadb5e693884 100644
--- a/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/model/Sample.java
+++ b/sdk-platform-java/gapic-generator-java/src/main/java/com/google/api/generator/gapic/model/Sample.java
@@ -39,6 +39,8 @@ public abstract class Sample {
 
   public abstract boolean isCanonical();
 
+
+
   public static Builder builder() {
     return new AutoValue_Sample.Builder()
         .setBody(ImmutableList.of())
@@ -88,6 +90,8 @@ public abstract static class Builder {
 
     public abstract Builder setIsCanonical(boolean isCanonical);
 
+
+
     abstract Builder setName(String name);
 
     abstract Sample autoBuild();
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/goldens/GrpcServiceClientWithNestedClassImport.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/goldens/GrpcServiceClientWithNestedClassImport.golden
index 9a8f46553d49..a7e7b2a709f4 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/goldens/GrpcServiceClientWithNestedClassImport.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/engine/writer/goldens/GrpcServiceClientWithNestedClassImport.golden
@@ -20,11 +20,14 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (NestedMessageServiceClient nestedMessageServiceClient =
- *     NestedMessageServiceClient.create()) {
- *   Outer.Middle request = Outer.Middle.newBuilder().setX(120).build();
- *   Outer.Middle.Inner response = nestedMessageServiceClient.nestedMessageMethod(request);
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * NestedMessageServiceClient nestedMessageServiceClient = NestedMessageServiceClient.create();
+ * Outer.Middle request = Outer.Middle.newBuilder().setX(120).build();
+ * Outer.Middle.Inner response = nestedMessageServiceClient.nestedMessageMethod(request);
  * }</pre>
  *
  * <p>Note: close() needs to be called on the NestedMessageServiceClient object to clean up
@@ -71,6 +74,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * NestedMessageServiceSettings nestedMessageServiceSettings =
  *     NestedMessageServiceSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -87,6 +95,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * NestedMessageServiceSettings nestedMessageServiceSettings =
  *     NestedMessageServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
  * NestedMessageServiceClient nestedMessageServiceClient =
@@ -155,11 +168,14 @@ public class NestedMessageServiceClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (NestedMessageServiceClient nestedMessageServiceClient =
-   *     NestedMessageServiceClient.create()) {
-   *   Outer.Middle request = Outer.Middle.newBuilder().setX(120).build();
-   *   Outer.Middle.Inner response = nestedMessageServiceClient.nestedMessageMethod(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * NestedMessageServiceClient nestedMessageServiceClient = NestedMessageServiceClient.create();
+   * Outer.Middle request = Outer.Middle.newBuilder().setX(120).build();
+   * Outer.Middle.Inner response = nestedMessageServiceClient.nestedMessageMethod(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -179,14 +195,17 @@ public class NestedMessageServiceClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (NestedMessageServiceClient nestedMessageServiceClient =
-   *     NestedMessageServiceClient.create()) {
-   *   Outer.Middle request = Outer.Middle.newBuilder().setX(120).build();
-   *   ApiFuture<Outer.Middle.Inner> future =
-   *       nestedMessageServiceClient.nestedMessageMethodCallable().futureCall(request);
-   *   // Do something.
-   *   Outer.Middle.Inner response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * NestedMessageServiceClient nestedMessageServiceClient = NestedMessageServiceClient.create();
+   * Outer.Middle request = Outer.Middle.newBuilder().setX(120).build();
+   * ApiFuture<Outer.Middle.Inner> future =
+   *     nestedMessageServiceClient.nestedMessageMethodCallable().futureCall(request);
+   * // Do something.
+   * Outer.Middle.Inner response = future.get();
    * }</pre>
    */
   public final UnaryCallable<Outer.Middle, Outer.Middle.Inner> nestedMessageMethodCallable() {
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/goldens/ShowcaseWithEchoPackageInfo.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/goldens/ShowcaseWithEchoPackageInfo.golden
index a2c213eb1163..8496e56f0f37 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/goldens/ShowcaseWithEchoPackageInfo.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/goldens/ShowcaseWithEchoPackageInfo.golden
@@ -16,9 +16,13 @@
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (EchoClient echoClient = EchoClient.create()) {
- *   EchoResponse response = echoClient.echo();
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * EchoClient echoClient = EchoClient.create();
+ * EchoResponse response = echoClient.echo();
  * }</pre>
  */
 @Generated("by gapic-generator-java")
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/BookshopClient.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/BookshopClient.golden
index 13e54850392c..8e1b651f2631 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/BookshopClient.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/BookshopClient.golden
@@ -21,11 +21,15 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (BookshopClient bookshopClient = BookshopClient.create()) {
- *   int booksCount = 1618425911;
- *   List<Book> books = new ArrayList<>();
- *   Book response = bookshopClient.getBook(booksCount, books);
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * BookshopClient bookshopClient = BookshopClient.create();
+ * int booksCount = 1618425911;
+ * List<Book> books = new ArrayList<>();
+ * Book response = bookshopClient.getBook(booksCount, books);
  * }</pre>
  *
  * <p>Note: close() needs to be called on the BookshopClient object to clean up resources such as
@@ -76,6 +80,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * BookshopSettings bookshopSettings =
  *     BookshopSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -91,6 +100,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * BookshopSettings bookshopSettings =
  *     BookshopSettings.newBuilder().setEndpoint(myEndpoint).build();
  * BookshopClient bookshopClient = BookshopClient.create(bookshopSettings);
@@ -157,11 +171,15 @@ public class BookshopClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (BookshopClient bookshopClient = BookshopClient.create()) {
-   *   int booksCount = 1618425911;
-   *   List<Book> books = new ArrayList<>();
-   *   Book response = bookshopClient.getBook(booksCount, books);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * BookshopClient bookshopClient = BookshopClient.create();
+   * int booksCount = 1618425911;
+   * List<Book> books = new ArrayList<>();
+   * Book response = bookshopClient.getBook(booksCount, books);
    * }</pre>
    *
    * @param booksCount
@@ -184,11 +202,15 @@ public class BookshopClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (BookshopClient bookshopClient = BookshopClient.create()) {
-   *   String booksList = "booksList2-1119589686";
-   *   List<Book> books = new ArrayList<>();
-   *   Book response = bookshopClient.getBook(booksList, books);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * BookshopClient bookshopClient = BookshopClient.create();
+   * String booksList = "booksList2-1119589686";
+   * List<Book> books = new ArrayList<>();
+   * Book response = bookshopClient.getBook(booksList, books);
    * }</pre>
    *
    * @param booksList
@@ -211,15 +233,19 @@ public class BookshopClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (BookshopClient bookshopClient = BookshopClient.create()) {
-   *   GetBookRequest request =
-   *       GetBookRequest.newBuilder()
-   *           .setBooksCount1(1618425911)
-   *           .setBooksList2("booksList2-1119589686")
-   *           .addAllBooks3(new ArrayList<Book>())
-   *           .build();
-   *   Book response = bookshopClient.getBook(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * BookshopClient bookshopClient = BookshopClient.create();
+   * GetBookRequest request =
+   *     GetBookRequest.newBuilder()
+   *         .setBooksCount1(1618425911)
+   *         .setBooksList2("booksList2-1119589686")
+   *         .addAllBooks3(new ArrayList<Book>())
+   *         .build();
+   * Book response = bookshopClient.getBook(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -239,17 +265,21 @@ public class BookshopClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (BookshopClient bookshopClient = BookshopClient.create()) {
-   *   GetBookRequest request =
-   *       GetBookRequest.newBuilder()
-   *           .setBooksCount1(1618425911)
-   *           .setBooksList2("booksList2-1119589686")
-   *           .addAllBooks3(new ArrayList<Book>())
-   *           .build();
-   *   ApiFuture<Book> future = bookshopClient.getBookCallable().futureCall(request);
-   *   // Do something.
-   *   Book response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * BookshopClient bookshopClient = BookshopClient.create();
+   * GetBookRequest request =
+   *     GetBookRequest.newBuilder()
+   *         .setBooksCount1(1618425911)
+   *         .setBooksList2("booksList2-1119589686")
+   *         .addAllBooks3(new ArrayList<Book>())
+   *         .build();
+   * ApiFuture<Book> future = bookshopClient.getBookCallable().futureCall(request);
+   * // Do something.
+   * Book response = future.get();
    * }</pre>
    */
   public final UnaryCallable<GetBookRequest, Book> getBookCallable() {
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/DeprecatedServiceClient.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/DeprecatedServiceClient.golden
index aec12869e407..7b8751c3c155 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/DeprecatedServiceClient.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/DeprecatedServiceClient.golden
@@ -20,10 +20,14 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
- *   FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
- *   deprecatedServiceClient.fastFibonacci(request);
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+ * FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+ * deprecatedServiceClient.fastFibonacci(request);
  * }</pre>
  *
  * <p>Note: close() needs to be called on the DeprecatedServiceClient object to clean up resources
@@ -84,6 +88,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * DeprecatedServiceSettings deprecatedServiceSettings =
  *     DeprecatedServiceSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -100,6 +109,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * DeprecatedServiceSettings deprecatedServiceSettings =
  *     DeprecatedServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
  * DeprecatedServiceClient deprecatedServiceClient =
@@ -171,10 +185,14 @@ public class DeprecatedServiceClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
-   *   FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
-   *   deprecatedServiceClient.fastFibonacci(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+   * FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+   * deprecatedServiceClient.fastFibonacci(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -194,12 +212,16 @@ public class DeprecatedServiceClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
-   *   FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
-   *   ApiFuture<Empty> future = deprecatedServiceClient.fastFibonacciCallable().futureCall(request);
-   *   // Do something.
-   *   future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+   * FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+   * ApiFuture<Empty> future = deprecatedServiceClient.fastFibonacciCallable().futureCall(request);
+   * // Do something.
+   * future.get();
    * }</pre>
    */
   public final UnaryCallable<FibonacciRequest, Empty> fastFibonacciCallable() {
@@ -216,10 +238,14 @@ public class DeprecatedServiceClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
-   *   FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
-   *   deprecatedServiceClient.slowFibonacci(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+   * FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+   * deprecatedServiceClient.slowFibonacci(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -241,12 +267,16 @@ public class DeprecatedServiceClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
-   *   FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
-   *   ApiFuture<Empty> future = deprecatedServiceClient.slowFibonacciCallable().futureCall(request);
-   *   // Do something.
-   *   future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+   * FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+   * ApiFuture<Empty> future = deprecatedServiceClient.slowFibonacciCallable().futureCall(request);
+   * // Do something.
+   * future.get();
    * }</pre>
    *
    * @deprecated This method is deprecated and will be removed in the next major version update.
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoClient.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoClient.golden
index 612111aea0df..403909b5baf1 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoClient.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoClient.golden
@@ -44,9 +44,13 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (EchoClient echoClient = EchoClient.create()) {
- *   EchoResponse response = echoClient.echo();
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * EchoClient echoClient = EchoClient.create();
+ * EchoResponse response = echoClient.echo();
  * }</pre>
  *
  * <p>Note: close() needs to be called on the EchoClient object to clean up resources such as
@@ -239,6 +243,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * EchoSettings echoSettings =
  *     EchoSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -254,6 +263,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * EchoSettings echoSettings = EchoSettings.newBuilder().setEndpoint(myEndpoint).build();
  * EchoClient echoClient = EchoClient.create(echoSettings);
  * }</pre>
@@ -330,9 +344,13 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoResponse response = echoClient.echo();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoResponse response = echoClient.echo();
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -353,10 +371,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   ResourceName parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
-   *   EchoResponse response = echoClient.echo(parent);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * ResourceName parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
+   * EchoResponse response = echoClient.echo(parent);
    * }</pre>
    *
    * @param parent
@@ -378,10 +400,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   Status error = Status.newBuilder().build();
-   *   EchoResponse response = echoClient.echo(error);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * Status error = Status.newBuilder().build();
+   * EchoResponse response = echoClient.echo(error);
    * }</pre>
    *
    * @param error
@@ -402,10 +428,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   FoobarName name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
-   *   EchoResponse response = echoClient.echo(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * FoobarName name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
+   * EchoResponse response = echoClient.echo(name);
    * }</pre>
    *
    * @param name
@@ -427,10 +457,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   String content = "content951530617";
-   *   EchoResponse response = echoClient.echo(content);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * String content = "content951530617";
+   * EchoResponse response = echoClient.echo(content);
    * }</pre>
    *
    * @param content
@@ -451,10 +485,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   String name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
-   *   EchoResponse response = echoClient.echo(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * String name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
+   * EchoResponse response = echoClient.echo(name);
    * }</pre>
    *
    * @param name
@@ -475,10 +513,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   String parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
-   *   EchoResponse response = echoClient.echo(parent);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * String parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
+   * EchoResponse response = echoClient.echo(parent);
    * }</pre>
    *
    * @param parent
@@ -499,11 +541,15 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   String content = "content951530617";
-   *   Severity severity = Severity.forNumber(0);
-   *   EchoResponse response = echoClient.echo(content, severity);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * String content = "content951530617";
+   * Severity severity = Severity.forNumber(0);
+   * EchoResponse response = echoClient.echo(content, severity);
    * }</pre>
    *
    * @param content
@@ -526,16 +572,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   EchoResponse response = echoClient.echo(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * EchoResponse response = echoClient.echo(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -555,18 +605,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   ApiFuture<EchoResponse> future = echoClient.echoCallable().futureCall(request);
-   *   // Do something.
-   *   EchoResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * ApiFuture<EchoResponse> future = echoClient.echoCallable().futureCall(request);
+   * // Do something.
+   * EchoResponse response = future.get();
    * }</pre>
    */
   public final UnaryCallable<EchoRequest, EchoResponse> echoCallable() {
@@ -583,13 +637,17 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   ExpandRequest request =
-   *       ExpandRequest.newBuilder().setContent("content951530617").setInfo("info3237038").build();
-   *   ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);
-   *   for (EchoResponse response : stream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * ExpandRequest request =
+   *     ExpandRequest.newBuilder().setContent("content951530617").setInfo("info3237038").build();
+   * ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);
+   * for (EchoResponse response : stream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -607,35 +665,39 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   ApiStreamObserver<EchoRequest> responseObserver =
-   *       new ApiStreamObserver<EchoRequest>() {
-   *         {@literal @}Override
-   *         public void onNext(EchoResponse response) {
-   *           // Do something when a response is received.
-   *         }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * ApiStreamObserver<EchoRequest> responseObserver =
+   *     new ApiStreamObserver<EchoRequest>() {
+   *       {@literal @}Override
+   *       public void onNext(EchoResponse response) {
+   *         // Do something when a response is received.
+   *       }
    *
-   *         {@literal @}Override
-   *         public void onError(Throwable t) {
-   *           // Add error-handling
-   *         }
+   *       {@literal @}Override
+   *       public void onError(Throwable t) {
+   *         // Add error-handling
+   *       }
    *
-   *         {@literal @}Override
-   *         public void onCompleted() {
-   *           // Do something when complete.
-   *         }
-   *       };
-   *   ApiStreamObserver<EchoRequest> requestObserver =
-   *       echoClient.collect().clientStreamingCall(responseObserver);
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   requestObserver.onNext(request);
-   * }
+   *       {@literal @}Override
+   *       public void onCompleted() {
+   *         // Do something when complete.
+   *       }
+   *     };
+   * ApiStreamObserver<EchoRequest> requestObserver =
+   *     echoClient.collect().clientStreamingCall(responseObserver);
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * requestObserver.onNext(request);
    * }</pre>
    */
   public final ClientStreamingCallable<EchoRequest, EchoResponse> collectCallable() {
@@ -652,19 +714,23 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatCallable().call();
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   bidiStream.send(request);
-   *   for (EchoResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatCallable().call();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * bidiStream.send(request);
+   * for (EchoResponse response : bidiStream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -682,19 +748,23 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatAgainCallable().call();
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   bidiStream.send(request);
-   *   for (EchoResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatAgainCallable().call();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * bidiStream.send(request);
+   * for (EchoResponse response : bidiStream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -712,16 +782,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (EchoResponse element : echoClient.pagedExpand(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * for (EchoResponse element : echoClient.pagedExpand(request).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -742,18 +816,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<EchoResponse> future = echoClient.pagedExpandPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (EchoResponse element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<EchoResponse> future = echoClient.pagedExpandPagedCallable().futureCall(request);
+   * // Do something.
+   * for (EchoResponse element : future.get().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    */
@@ -772,24 +850,28 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     PagedExpandResponse response = echoClient.pagedExpandCallable().call(request);
-   *     for (EchoResponse element : response.getResponsesList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * while (true) {
+   *   PagedExpandResponse response = echoClient.pagedExpandCallable().call(request);
+   *   for (EchoResponse element : response.getResponsesList()) {
+   *     // doThingsWith(element);
+   *   }
+   *   String nextPageToken = response.getNextPageToken();
+   *   if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *     request = request.toBuilder().setPageToken(nextPageToken).build();
+   *   } else {
+   *     break;
    *   }
    * }
    * }</pre>
@@ -808,10 +890,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   for (EchoResponse element : echoClient.simplePagedExpand().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * for (EchoResponse element : echoClient.simplePagedExpand().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -833,16 +919,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (EchoResponse element : echoClient.simplePagedExpand(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * for (EchoResponse element : echoClient.simplePagedExpand(request).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -863,19 +953,23 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<EchoResponse> future =
-   *       echoClient.simplePagedExpandPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (EchoResponse element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<EchoResponse> future =
+   *     echoClient.simplePagedExpandPagedCallable().futureCall(request);
+   * // Do something.
+   * for (EchoResponse element : future.get().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    */
@@ -894,24 +988,28 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     PagedExpandResponse response = echoClient.simplePagedExpandCallable().call(request);
-   *     for (EchoResponse element : response.getResponsesList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * while (true) {
+   *   PagedExpandResponse response = echoClient.simplePagedExpandCallable().call(request);
+   *   for (EchoResponse element : response.getResponsesList()) {
+   *     // doThingsWith(element);
+   *   }
+   *   String nextPageToken = response.getNextPageToken();
+   *   if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *     request = request.toBuilder().setPageToken(nextPageToken).build();
+   *   } else {
+   *     break;
    *   }
    * }
    * }</pre>
@@ -930,10 +1028,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   Duration ttl = Duration.newBuilder().build();
-   *   WaitResponse response = echoClient.waitAsync(ttl).get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * Duration ttl = Duration.newBuilder().build();
+   * WaitResponse response = echoClient.waitAsync(ttl).get();
    * }</pre>
    *
    * @param ttl
@@ -954,10 +1056,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   Timestamp endTime = Timestamp.newBuilder().build();
-   *   WaitResponse response = echoClient.waitAsync(endTime).get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * Timestamp endTime = Timestamp.newBuilder().build();
+   * WaitResponse response = echoClient.waitAsync(endTime).get();
    * }</pre>
    *
    * @param endTime
@@ -978,10 +1084,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   WaitRequest request = WaitRequest.newBuilder().build();
-   *   WaitResponse response = echoClient.waitAsync(request).get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * WaitRequest request = WaitRequest.newBuilder().build();
+   * WaitResponse response = echoClient.waitAsync(request).get();
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1001,13 +1111,17 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   WaitRequest request = WaitRequest.newBuilder().build();
-   *   OperationFuture<WaitResponse, WaitMetadata> future =
-   *       echoClient.waitOperationCallable().futureCall(request);
-   *   // Do something.
-   *   WaitResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * WaitRequest request = WaitRequest.newBuilder().build();
+   * OperationFuture<WaitResponse, WaitMetadata> future =
+   *     echoClient.waitOperationCallable().futureCall(request);
+   * // Do something.
+   * WaitResponse response = future.get();
    * }</pre>
    */
   public final OperationCallable<WaitRequest, WaitResponse, WaitMetadata> waitOperationCallable() {
@@ -1024,12 +1138,16 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   WaitRequest request = WaitRequest.newBuilder().build();
-   *   ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);
-   *   // Do something.
-   *   Operation response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * WaitRequest request = WaitRequest.newBuilder().build();
+   * ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);
+   * // Do something.
+   * Operation response = future.get();
    * }</pre>
    */
   public final UnaryCallable<WaitRequest, Operation> waitCallable() {
@@ -1046,10 +1164,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   BlockRequest request = BlockRequest.newBuilder().build();
-   *   BlockResponse response = echoClient.block(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * BlockRequest request = BlockRequest.newBuilder().build();
+   * BlockResponse response = echoClient.block(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1069,12 +1191,16 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   BlockRequest request = BlockRequest.newBuilder().build();
-   *   ApiFuture<BlockResponse> future = echoClient.blockCallable().futureCall(request);
-   *   // Do something.
-   *   BlockResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * BlockRequest request = BlockRequest.newBuilder().build();
+   * ApiFuture<BlockResponse> future = echoClient.blockCallable().futureCall(request);
+   * // Do something.
+   * BlockResponse response = future.get();
    * }</pre>
    */
   public final UnaryCallable<BlockRequest, BlockResponse> blockCallable() {
@@ -1091,16 +1217,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   Object response = echoClient.collideName(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * Object response = echoClient.collideName(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1120,18 +1250,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   ApiFuture<Object> future = echoClient.collideNameCallable().futureCall(request);
-   *   // Do something.
-   *   Object response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * ApiFuture<Object> future = echoClient.collideNameCallable().futureCall(request);
+   * // Do something.
+   * Object response = future.get();
    * }</pre>
    */
   public final UnaryCallable<EchoRequest, Object> collideNameCallable() {
@@ -1148,15 +1282,19 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandLegacyRequest request =
-   *       PagedExpandLegacyRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setMaxResults(1128457243)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   PagedExpandResponse response = echoClient.pagedExpandLegacy(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandLegacyRequest request =
+   *     PagedExpandLegacyRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setMaxResults(1128457243)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * PagedExpandResponse response = echoClient.pagedExpandLegacy(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1176,18 +1314,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandLegacyRequest request =
-   *       PagedExpandLegacyRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setMaxResults(1128457243)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<PagedExpandResponse> future =
-   *       echoClient.pagedExpandLegacyCallable().futureCall(request);
-   *   // Do something.
-   *   PagedExpandResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandLegacyRequest request =
+   *     PagedExpandLegacyRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setMaxResults(1128457243)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<PagedExpandResponse> future =
+   *     echoClient.pagedExpandLegacyCallable().futureCall(request);
+   * // Do something.
+   * PagedExpandResponse response = future.get();
    * }</pre>
    */
   public final UnaryCallable<PagedExpandLegacyRequest, PagedExpandResponse>
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoServiceSelectiveGapicClient.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoServiceSelectiveGapicClient.golden
index 731ebe1834bf..6023821bf454 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoServiceSelectiveGapicClient.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoServiceSelectiveGapicClient.golden
@@ -22,11 +22,14 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
- *     EchoServiceShouldGeneratePartialUsualClient.create()) {
- *   EchoResponse response =
- *       echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual();
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+ *     EchoServiceShouldGeneratePartialUsualClient.create();
+ * EchoResponse response = echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual();
  * }</pre>
  *
  * <p>Note: close() needs to be called on the EchoServiceShouldGeneratePartialUsualClient object to
@@ -129,6 +132,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * EchoServiceShouldGeneratePartialUsualSettings echoServiceShouldGeneratePartialUsualSettings =
  *     EchoServiceShouldGeneratePartialUsualSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -146,6 +154,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * EchoServiceShouldGeneratePartialUsualSettings echoServiceShouldGeneratePartialUsualSettings =
  *     EchoServiceShouldGeneratePartialUsualSettings.newBuilder().setEndpoint(myEndpoint).build();
  * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
@@ -225,11 +238,14 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   EchoResponse response =
-   *       echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * EchoResponse response = echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual();
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -250,12 +266,16 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   FoobarName name = FoobarName.of("[PROJECT]", "[FOOBAR]");
-   *   EchoResponse response =
-   *       echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * FoobarName name = FoobarName.of("[PROJECT]", "[FOOBAR]");
+   * EchoResponse response =
+   *     echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(name);
    * }</pre>
    *
    * @param name
@@ -277,12 +297,16 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   String name = FoobarName.of("[PROJECT]", "[FOOBAR]").toString();
-   *   EchoResponse response =
-   *       echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * String name = FoobarName.of("[PROJECT]", "[FOOBAR]").toString();
+   * EchoResponse response =
+   *     echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(name);
    * }</pre>
    *
    * @param name
@@ -303,17 +327,21 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   EchoResponse response =
-   *       echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * EchoResponse response =
+   *     echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -333,21 +361,25 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   ApiFuture<EchoResponse> future =
-   *       echoServiceShouldGeneratePartialUsualClient
-   *           .echoShouldGenerateAsUsualCallable()
-   *           .futureCall(request);
-   *   // Do something.
-   *   EchoResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * ApiFuture<EchoResponse> future =
+   *     echoServiceShouldGeneratePartialUsualClient
+   *         .echoShouldGenerateAsUsualCallable()
+   *         .futureCall(request);
+   * // Do something.
+   * EchoResponse response = future.get();
    * }</pre>
    */
   public final UnaryCallable<EchoRequest, EchoResponse> echoShouldGenerateAsUsualCallable() {
@@ -364,20 +396,24 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   BidiStream<EchoRequest, EchoResponse> bidiStream =
-   *       echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsUsualCallable().call();
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   bidiStream.send(request);
-   *   for (EchoResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * BidiStream<EchoRequest, EchoResponse> bidiStream =
+   *     echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsUsualCallable().call();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * bidiStream.send(request);
+   * for (EchoResponse response : bidiStream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -396,22 +432,24 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   BidiStream<EchoRequest, EchoResponse> bidiStream =
-   *       echoServiceShouldGeneratePartialUsualClient
-   *           .chatAgainShouldGenerateAsUsualCallable()
-   *           .call();
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   bidiStream.send(request);
-   *   for (EchoResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * BidiStream<EchoRequest, EchoResponse> bidiStream =
+   *     echoServiceShouldGeneratePartialUsualClient.chatAgainShouldGenerateAsUsualCallable().call();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * bidiStream.send(request);
+   * for (EchoResponse response : bidiStream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -430,11 +468,15 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   EchoResponse response =
-   *       echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * EchoResponse response =
+   *     echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal();
    * }</pre>
    *
    * <p><b>Warning: </b>This method is for internal use only. Please do not use it directly.
@@ -458,12 +500,16 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   FoobarName name = FoobarName.of("[PROJECT]", "[FOOBAR]");
-   *   EchoResponse response =
-   *       echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * FoobarName name = FoobarName.of("[PROJECT]", "[FOOBAR]");
+   * EchoResponse response =
+   *     echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(name);
    * }</pre>
    *
    * <p><b>Warning: </b>This method is for internal use only. Please do not use it directly.
@@ -488,12 +534,16 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   String name = FoobarName.of("[PROJECT]", "[FOOBAR]").toString();
-   *   EchoResponse response =
-   *       echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * String name = FoobarName.of("[PROJECT]", "[FOOBAR]").toString();
+   * EchoResponse response =
+   *     echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(name);
    * }</pre>
    *
    * <p><b>Warning: </b>This method is for internal use only. Please do not use it directly.
@@ -517,17 +567,21 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   EchoResponse response =
-   *       echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * EchoResponse response =
+   *     echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(request);
    * }</pre>
    *
    * <p><b>Warning: </b>This method is for internal use only. Please do not use it directly.
@@ -550,21 +604,25 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   ApiFuture<EchoResponse> future =
-   *       echoServiceShouldGeneratePartialUsualClient
-   *           .chatShouldGenerateAsInternalCallable()
-   *           .futureCall(request);
-   *   // Do something.
-   *   EchoResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * ApiFuture<EchoResponse> future =
+   *     echoServiceShouldGeneratePartialUsualClient
+   *         .chatShouldGenerateAsInternalCallable()
+   *         .futureCall(request);
+   * // Do something.
+   * EchoResponse response = future.get();
    * }</pre>
    *
    * <p><b>Warning: </b>This method is for internal use only. Please do not use it directly.
@@ -584,20 +642,24 @@ public class EchoServiceShouldGeneratePartialUsualClient implements BackgroundRe
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-   *     EchoServiceShouldGeneratePartialUsualClient.create()) {
-   *   BidiStream<EchoRequest, EchoResponse> bidiStream =
-   *       echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsInternalCallable().call();
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-   *           .setFoobar(Foobar.newBuilder().build())
-   *           .build();
-   *   bidiStream.send(request);
-   *   for (EchoResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+   *     EchoServiceShouldGeneratePartialUsualClient.create();
+   * BidiStream<EchoRequest, EchoResponse> bidiStream =
+   *     echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsInternalCallable().call();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+   *         .setFoobar(Foobar.newBuilder().build())
+   *         .build();
+   * bidiStream.send(request);
+   * for (EchoResponse response : bidiStream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    *
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/IdentityClient.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/IdentityClient.golden
index efb41dc308f5..4840657bbb42 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/IdentityClient.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/IdentityClient.golden
@@ -29,12 +29,16 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (IdentityClient identityClient = IdentityClient.create()) {
- *   String parent = UserName.of("[USER]").toString();
- *   String displayName = "displayName1714148973";
- *   String email = "email96619420";
- *   User response = identityClient.createUser(parent, displayName, email);
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * IdentityClient identityClient = IdentityClient.create();
+ * String parent = UserName.of("[USER]").toString();
+ * String displayName = "displayName1714148973";
+ * String email = "email96619420";
+ * User response = identityClient.createUser(parent, displayName, email);
  * }</pre>
  *
  * <p>Note: close() needs to be called on the IdentityClient object to clean up resources such as
@@ -153,6 +157,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * IdentitySettings identitySettings =
  *     IdentitySettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -168,6 +177,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * IdentitySettings identitySettings =
  *     IdentitySettings.newBuilder().setEndpoint(myEndpoint).build();
  * IdentityClient identityClient = IdentityClient.create(identitySettings);
@@ -234,12 +248,16 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   String parent = UserName.of("[USER]").toString();
-   *   String displayName = "displayName1714148973";
-   *   String email = "email96619420";
-   *   User response = identityClient.createUser(parent, displayName, email);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * String parent = UserName.of("[USER]").toString();
+   * String displayName = "displayName1714148973";
+   * String email = "email96619420";
+   * User response = identityClient.createUser(parent, displayName, email);
    * }</pre>
    *
    * @param parent
@@ -266,18 +284,22 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   String parent = UserName.of("[USER]").toString();
-   *   String displayName = "displayName1714148973";
-   *   String email = "email96619420";
-   *   int age = 96511;
-   *   String nickname = "nickname70690926";
-   *   boolean enableNotifications = true;
-   *   double heightFeet = -1032737338;
-   *   User response =
-   *       identityClient.createUser(
-   *           parent, displayName, email, age, nickname, enableNotifications, heightFeet);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * String parent = UserName.of("[USER]").toString();
+   * String displayName = "displayName1714148973";
+   * String email = "email96619420";
+   * int age = 96511;
+   * String nickname = "nickname70690926";
+   * boolean enableNotifications = true;
+   * double heightFeet = -1032737338;
+   * User response =
+   *     identityClient.createUser(
+   *         parent, displayName, email, age, nickname, enableNotifications, heightFeet);
    * }</pre>
    *
    * @param parent
@@ -323,30 +345,34 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   String parent = UserName.of("[USER]").toString();
-   *   String displayName = "displayName1714148973";
-   *   String email = "email96619420";
-   *   String hobbyName = "hobbyName882586493";
-   *   String songName = "songName1535136064";
-   *   int weeklyFrequency = 1572999966;
-   *   String companyName = "companyName-508582744";
-   *   String title = "title110371416";
-   *   String subject = "subject-1867885268";
-   *   String artistName = "artistName629723762";
-   *   User response =
-   *       identityClient.createUser(
-   *           parent,
-   *           displayName,
-   *           email,
-   *           hobbyName,
-   *           songName,
-   *           weeklyFrequency,
-   *           companyName,
-   *           title,
-   *           subject,
-   *           artistName);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * String parent = UserName.of("[USER]").toString();
+   * String displayName = "displayName1714148973";
+   * String email = "email96619420";
+   * String hobbyName = "hobbyName882586493";
+   * String songName = "songName1535136064";
+   * int weeklyFrequency = 1572999966;
+   * String companyName = "companyName-508582744";
+   * String title = "title110371416";
+   * String subject = "subject-1867885268";
+   * String artistName = "artistName629723762";
+   * User response =
+   *     identityClient.createUser(
+   *         parent,
+   *         displayName,
+   *         email,
+   *         hobbyName,
+   *         songName,
+   *         weeklyFrequency,
+   *         companyName,
+   *         title,
+   *         subject,
+   *         artistName);
    * }</pre>
    *
    * @param parent
@@ -413,14 +439,18 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   CreateUserRequest request =
-   *       CreateUserRequest.newBuilder()
-   *           .setParent(UserName.of("[USER]").toString())
-   *           .setUser(User.newBuilder().build())
-   *           .build();
-   *   User response = identityClient.createUser(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * CreateUserRequest request =
+   *     CreateUserRequest.newBuilder()
+   *         .setParent(UserName.of("[USER]").toString())
+   *         .setUser(User.newBuilder().build())
+   *         .build();
+   * User response = identityClient.createUser(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -440,16 +470,20 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   CreateUserRequest request =
-   *       CreateUserRequest.newBuilder()
-   *           .setParent(UserName.of("[USER]").toString())
-   *           .setUser(User.newBuilder().build())
-   *           .build();
-   *   ApiFuture<User> future = identityClient.createUserCallable().futureCall(request);
-   *   // Do something.
-   *   User response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * CreateUserRequest request =
+   *     CreateUserRequest.newBuilder()
+   *         .setParent(UserName.of("[USER]").toString())
+   *         .setUser(User.newBuilder().build())
+   *         .build();
+   * ApiFuture<User> future = identityClient.createUserCallable().futureCall(request);
+   * // Do something.
+   * User response = future.get();
    * }</pre>
    */
   public final UnaryCallable<CreateUserRequest, User> createUserCallable() {
@@ -466,10 +500,14 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   UserName name = UserName.of("[USER]");
-   *   User response = identityClient.getUser(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * UserName name = UserName.of("[USER]");
+   * User response = identityClient.getUser(name);
    * }</pre>
    *
    * @param name
@@ -491,10 +529,14 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   String name = UserName.of("[USER]").toString();
-   *   User response = identityClient.getUser(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * String name = UserName.of("[USER]").toString();
+   * User response = identityClient.getUser(name);
    * }</pre>
    *
    * @param name
@@ -515,11 +557,15 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   GetUserRequest request =
-   *       GetUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
-   *   User response = identityClient.getUser(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * GetUserRequest request =
+   *     GetUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
+   * User response = identityClient.getUser(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -539,13 +585,17 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   GetUserRequest request =
-   *       GetUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
-   *   ApiFuture<User> future = identityClient.getUserCallable().futureCall(request);
-   *   // Do something.
-   *   User response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * GetUserRequest request =
+   *     GetUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
+   * ApiFuture<User> future = identityClient.getUserCallable().futureCall(request);
+   * // Do something.
+   * User response = future.get();
    * }</pre>
    */
   public final UnaryCallable<GetUserRequest, User> getUserCallable() {
@@ -562,11 +612,15 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   UpdateUserRequest request =
-   *       UpdateUserRequest.newBuilder().setUser(User.newBuilder().build()).build();
-   *   User response = identityClient.updateUser(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * UpdateUserRequest request =
+   *     UpdateUserRequest.newBuilder().setUser(User.newBuilder().build()).build();
+   * User response = identityClient.updateUser(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -586,13 +640,17 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   UpdateUserRequest request =
-   *       UpdateUserRequest.newBuilder().setUser(User.newBuilder().build()).build();
-   *   ApiFuture<User> future = identityClient.updateUserCallable().futureCall(request);
-   *   // Do something.
-   *   User response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * UpdateUserRequest request =
+   *     UpdateUserRequest.newBuilder().setUser(User.newBuilder().build()).build();
+   * ApiFuture<User> future = identityClient.updateUserCallable().futureCall(request);
+   * // Do something.
+   * User response = future.get();
    * }</pre>
    */
   public final UnaryCallable<UpdateUserRequest, User> updateUserCallable() {
@@ -609,10 +667,14 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   UserName name = UserName.of("[USER]");
-   *   identityClient.deleteUser(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * UserName name = UserName.of("[USER]");
+   * identityClient.deleteUser(name);
    * }</pre>
    *
    * @param name
@@ -634,10 +696,14 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   String name = UserName.of("[USER]").toString();
-   *   identityClient.deleteUser(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * String name = UserName.of("[USER]").toString();
+   * identityClient.deleteUser(name);
    * }</pre>
    *
    * @param name
@@ -658,11 +724,15 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   DeleteUserRequest request =
-   *       DeleteUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
-   *   identityClient.deleteUser(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * DeleteUserRequest request =
+   *     DeleteUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
+   * identityClient.deleteUser(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -682,13 +752,17 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   DeleteUserRequest request =
-   *       DeleteUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
-   *   ApiFuture<Empty> future = identityClient.deleteUserCallable().futureCall(request);
-   *   // Do something.
-   *   future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * DeleteUserRequest request =
+   *     DeleteUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
+   * ApiFuture<Empty> future = identityClient.deleteUserCallable().futureCall(request);
+   * // Do something.
+   * future.get();
    * }</pre>
    */
   public final UnaryCallable<DeleteUserRequest, Empty> deleteUserCallable() {
@@ -705,15 +779,19 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   ListUsersRequest request =
-   *       ListUsersRequest.newBuilder()
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (User element : identityClient.listUsers(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * ListUsersRequest request =
+   *     ListUsersRequest.newBuilder()
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * for (User element : identityClient.listUsers(request).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -734,17 +812,21 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   ListUsersRequest request =
-   *       ListUsersRequest.newBuilder()
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<User> future = identityClient.listUsersPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (User element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * ListUsersRequest request =
+   *     ListUsersRequest.newBuilder()
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<User> future = identityClient.listUsersPagedCallable().futureCall(request);
+   * // Do something.
+   * for (User element : future.get().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    */
@@ -762,23 +844,27 @@ public class IdentityClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (IdentityClient identityClient = IdentityClient.create()) {
-   *   ListUsersRequest request =
-   *       ListUsersRequest.newBuilder()
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     ListUsersResponse response = identityClient.listUsersCallable().call(request);
-   *     for (User element : response.getUsersList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * IdentityClient identityClient = IdentityClient.create();
+   * ListUsersRequest request =
+   *     ListUsersRequest.newBuilder()
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * while (true) {
+   *   ListUsersResponse response = identityClient.listUsersCallable().call(request);
+   *   for (User element : response.getUsersList()) {
+   *     // doThingsWith(element);
+   *   }
+   *   String nextPageToken = response.getNextPageToken();
+   *   if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *     request = request.toBuilder().setPageToken(nextPageToken).build();
+   *   } else {
+   *     break;
    *   }
    * }
    * }</pre>
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/MessagingClient.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/MessagingClient.golden
index 359ba586244e..9a7db5816f2e 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/MessagingClient.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/MessagingClient.golden
@@ -37,11 +37,15 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (MessagingClient messagingClient = MessagingClient.create()) {
- *   String displayName = "displayName1714148973";
- *   String description = "description-1724546052";
- *   Room response = messagingClient.createRoom(displayName, description);
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * MessagingClient messagingClient = MessagingClient.create();
+ * String displayName = "displayName1714148973";
+ * String description = "description-1724546052";
+ * Room response = messagingClient.createRoom(displayName, description);
  * }</pre>
  *
  * <p>Note: close() needs to be called on the MessagingClient object to clean up resources such as
@@ -303,6 +307,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * MessagingSettings messagingSettings =
  *     MessagingSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -318,6 +327,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * MessagingSettings messagingSettings =
  *     MessagingSettings.newBuilder().setEndpoint(myEndpoint).build();
  * MessagingClient messagingClient = MessagingClient.create(messagingSettings);
@@ -395,11 +409,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String displayName = "displayName1714148973";
-   *   String description = "description-1724546052";
-   *   Room response = messagingClient.createRoom(displayName, description);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String displayName = "displayName1714148973";
+   * String description = "description-1724546052";
+   * Room response = messagingClient.createRoom(displayName, description);
    * }</pre>
    *
    * @param displayName
@@ -425,11 +443,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   CreateRoomRequest request =
-   *       CreateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
-   *   Room response = messagingClient.createRoom(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * CreateRoomRequest request =
+   *     CreateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
+   * Room response = messagingClient.createRoom(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -449,13 +471,17 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   CreateRoomRequest request =
-   *       CreateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
-   *   ApiFuture<Room> future = messagingClient.createRoomCallable().futureCall(request);
-   *   // Do something.
-   *   Room response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * CreateRoomRequest request =
+   *     CreateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
+   * ApiFuture<Room> future = messagingClient.createRoomCallable().futureCall(request);
+   * // Do something.
+   * Room response = future.get();
    * }</pre>
    */
   public final UnaryCallable<CreateRoomRequest, Room> createRoomCallable() {
@@ -472,10 +498,14 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   RoomName name = RoomName.of("[ROOM]");
-   *   Room response = messagingClient.getRoom(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * RoomName name = RoomName.of("[ROOM]");
+   * Room response = messagingClient.getRoom(name);
    * }</pre>
    *
    * @param name
@@ -497,10 +527,14 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String name = RoomName.of("[ROOM]").toString();
-   *   Room response = messagingClient.getRoom(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String name = RoomName.of("[ROOM]").toString();
+   * Room response = messagingClient.getRoom(name);
    * }</pre>
    *
    * @param name
@@ -521,11 +555,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   GetRoomRequest request =
-   *       GetRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
-   *   Room response = messagingClient.getRoom(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * GetRoomRequest request =
+   *     GetRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
+   * Room response = messagingClient.getRoom(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -545,13 +583,17 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   GetRoomRequest request =
-   *       GetRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
-   *   ApiFuture<Room> future = messagingClient.getRoomCallable().futureCall(request);
-   *   // Do something.
-   *   Room response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * GetRoomRequest request =
+   *     GetRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
+   * ApiFuture<Room> future = messagingClient.getRoomCallable().futureCall(request);
+   * // Do something.
+   * Room response = future.get();
    * }</pre>
    */
   public final UnaryCallable<GetRoomRequest, Room> getRoomCallable() {
@@ -568,11 +610,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   UpdateRoomRequest request =
-   *       UpdateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
-   *   Room response = messagingClient.updateRoom(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * UpdateRoomRequest request =
+   *     UpdateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
+   * Room response = messagingClient.updateRoom(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -592,13 +638,17 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   UpdateRoomRequest request =
-   *       UpdateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
-   *   ApiFuture<Room> future = messagingClient.updateRoomCallable().futureCall(request);
-   *   // Do something.
-   *   Room response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * UpdateRoomRequest request =
+   *     UpdateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
+   * ApiFuture<Room> future = messagingClient.updateRoomCallable().futureCall(request);
+   * // Do something.
+   * Room response = future.get();
    * }</pre>
    */
   public final UnaryCallable<UpdateRoomRequest, Room> updateRoomCallable() {
@@ -615,10 +665,14 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   RoomName name = RoomName.of("[ROOM]");
-   *   messagingClient.deleteRoom(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * RoomName name = RoomName.of("[ROOM]");
+   * messagingClient.deleteRoom(name);
    * }</pre>
    *
    * @param name
@@ -640,10 +694,14 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String name = RoomName.of("[ROOM]").toString();
-   *   messagingClient.deleteRoom(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String name = RoomName.of("[ROOM]").toString();
+   * messagingClient.deleteRoom(name);
    * }</pre>
    *
    * @param name
@@ -664,11 +722,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   DeleteRoomRequest request =
-   *       DeleteRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
-   *   messagingClient.deleteRoom(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * DeleteRoomRequest request =
+   *     DeleteRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
+   * messagingClient.deleteRoom(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -688,13 +750,17 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   DeleteRoomRequest request =
-   *       DeleteRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
-   *   ApiFuture<Empty> future = messagingClient.deleteRoomCallable().futureCall(request);
-   *   // Do something.
-   *   future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * DeleteRoomRequest request =
+   *     DeleteRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
+   * ApiFuture<Empty> future = messagingClient.deleteRoomCallable().futureCall(request);
+   * // Do something.
+   * future.get();
    * }</pre>
    */
   public final UnaryCallable<DeleteRoomRequest, Empty> deleteRoomCallable() {
@@ -711,15 +777,19 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ListRoomsRequest request =
-   *       ListRoomsRequest.newBuilder()
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (Room element : messagingClient.listRooms(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ListRoomsRequest request =
+   *     ListRoomsRequest.newBuilder()
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * for (Room element : messagingClient.listRooms(request).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -740,17 +810,21 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ListRoomsRequest request =
-   *       ListRoomsRequest.newBuilder()
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<Room> future = messagingClient.listRoomsPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (Room element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ListRoomsRequest request =
+   *     ListRoomsRequest.newBuilder()
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<Room> future = messagingClient.listRoomsPagedCallable().futureCall(request);
+   * // Do something.
+   * for (Room element : future.get().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    */
@@ -768,23 +842,27 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ListRoomsRequest request =
-   *       ListRoomsRequest.newBuilder()
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     ListRoomsResponse response = messagingClient.listRoomsCallable().call(request);
-   *     for (Room element : response.getRoomsList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ListRoomsRequest request =
+   *     ListRoomsRequest.newBuilder()
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * while (true) {
+   *   ListRoomsResponse response = messagingClient.listRoomsCallable().call(request);
+   *   for (Room element : response.getRoomsList()) {
+   *     // doThingsWith(element);
+   *   }
+   *   String nextPageToken = response.getNextPageToken();
+   *   if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *     request = request.toBuilder().setPageToken(nextPageToken).build();
+   *   } else {
+   *     break;
    *   }
    * }
    * }</pre>
@@ -803,11 +881,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ProfileName parent = ProfileName.of("[USER]");
-   *   ByteString image = ByteString.EMPTY;
-   *   Blurb response = messagingClient.createBlurb(parent, image);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ProfileName parent = ProfileName.of("[USER]");
+   * ByteString image = ByteString.EMPTY;
+   * Blurb response = messagingClient.createBlurb(parent, image);
    * }</pre>
    *
    * @param parent
@@ -833,11 +915,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ProfileName parent = ProfileName.of("[USER]");
-   *   String text = "text3556653";
-   *   Blurb response = messagingClient.createBlurb(parent, text);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ProfileName parent = ProfileName.of("[USER]");
+   * String text = "text3556653";
+   * Blurb response = messagingClient.createBlurb(parent, text);
    * }</pre>
    *
    * @param parent
@@ -863,11 +949,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   RoomName parent = RoomName.of("[ROOM]");
-   *   ByteString image = ByteString.EMPTY;
-   *   Blurb response = messagingClient.createBlurb(parent, image);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * RoomName parent = RoomName.of("[ROOM]");
+   * ByteString image = ByteString.EMPTY;
+   * Blurb response = messagingClient.createBlurb(parent, image);
    * }</pre>
    *
    * @param parent
@@ -893,11 +983,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   RoomName parent = RoomName.of("[ROOM]");
-   *   String text = "text3556653";
-   *   Blurb response = messagingClient.createBlurb(parent, text);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * RoomName parent = RoomName.of("[ROOM]");
+   * String text = "text3556653";
+   * Blurb response = messagingClient.createBlurb(parent, text);
    * }</pre>
    *
    * @param parent
@@ -923,11 +1017,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String parent = ProfileName.of("[USER]").toString();
-   *   ByteString image = ByteString.EMPTY;
-   *   Blurb response = messagingClient.createBlurb(parent, image);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String parent = ProfileName.of("[USER]").toString();
+   * ByteString image = ByteString.EMPTY;
+   * Blurb response = messagingClient.createBlurb(parent, image);
    * }</pre>
    *
    * @param parent
@@ -953,11 +1051,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String parent = ProfileName.of("[USER]").toString();
-   *   String text = "text3556653";
-   *   Blurb response = messagingClient.createBlurb(parent, text);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String parent = ProfileName.of("[USER]").toString();
+   * String text = "text3556653";
+   * Blurb response = messagingClient.createBlurb(parent, text);
    * }</pre>
    *
    * @param parent
@@ -983,14 +1085,18 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   CreateBlurbRequest request =
-   *       CreateBlurbRequest.newBuilder()
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setBlurb(Blurb.newBuilder().build())
-   *           .build();
-   *   Blurb response = messagingClient.createBlurb(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * CreateBlurbRequest request =
+   *     CreateBlurbRequest.newBuilder()
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setBlurb(Blurb.newBuilder().build())
+   *         .build();
+   * Blurb response = messagingClient.createBlurb(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1010,16 +1116,20 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   CreateBlurbRequest request =
-   *       CreateBlurbRequest.newBuilder()
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setBlurb(Blurb.newBuilder().build())
-   *           .build();
-   *   ApiFuture<Blurb> future = messagingClient.createBlurbCallable().futureCall(request);
-   *   // Do something.
-   *   Blurb response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * CreateBlurbRequest request =
+   *     CreateBlurbRequest.newBuilder()
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setBlurb(Blurb.newBuilder().build())
+   *         .build();
+   * ApiFuture<Blurb> future = messagingClient.createBlurbCallable().futureCall(request);
+   * // Do something.
+   * Blurb response = future.get();
    * }</pre>
    */
   public final UnaryCallable<CreateBlurbRequest, Blurb> createBlurbCallable() {
@@ -1036,10 +1146,14 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   BlurbName name = BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]");
-   *   Blurb response = messagingClient.getBlurb(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * BlurbName name = BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]");
+   * Blurb response = messagingClient.getBlurb(name);
    * }</pre>
    *
    * @param name
@@ -1061,11 +1175,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String name =
-   *       BlurbName.ofUserLegacyUserBlurbName("[USER]", "[LEGACY_USER]", "[BLURB]").toString();
-   *   Blurb response = messagingClient.getBlurb(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String name =
+   *     BlurbName.ofUserLegacyUserBlurbName("[USER]", "[LEGACY_USER]", "[BLURB]").toString();
+   * Blurb response = messagingClient.getBlurb(name);
    * }</pre>
    *
    * @param name
@@ -1086,13 +1204,17 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   GetBlurbRequest request =
-   *       GetBlurbRequest.newBuilder()
-   *           .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
-   *           .build();
-   *   Blurb response = messagingClient.getBlurb(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * GetBlurbRequest request =
+   *     GetBlurbRequest.newBuilder()
+   *         .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
+   *         .build();
+   * Blurb response = messagingClient.getBlurb(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1112,15 +1234,19 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   GetBlurbRequest request =
-   *       GetBlurbRequest.newBuilder()
-   *           .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
-   *           .build();
-   *   ApiFuture<Blurb> future = messagingClient.getBlurbCallable().futureCall(request);
-   *   // Do something.
-   *   Blurb response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * GetBlurbRequest request =
+   *     GetBlurbRequest.newBuilder()
+   *         .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
+   *         .build();
+   * ApiFuture<Blurb> future = messagingClient.getBlurbCallable().futureCall(request);
+   * // Do something.
+   * Blurb response = future.get();
    * }</pre>
    */
   public final UnaryCallable<GetBlurbRequest, Blurb> getBlurbCallable() {
@@ -1137,11 +1263,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   UpdateBlurbRequest request =
-   *       UpdateBlurbRequest.newBuilder().setBlurb(Blurb.newBuilder().build()).build();
-   *   Blurb response = messagingClient.updateBlurb(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * UpdateBlurbRequest request =
+   *     UpdateBlurbRequest.newBuilder().setBlurb(Blurb.newBuilder().build()).build();
+   * Blurb response = messagingClient.updateBlurb(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1161,13 +1291,17 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   UpdateBlurbRequest request =
-   *       UpdateBlurbRequest.newBuilder().setBlurb(Blurb.newBuilder().build()).build();
-   *   ApiFuture<Blurb> future = messagingClient.updateBlurbCallable().futureCall(request);
-   *   // Do something.
-   *   Blurb response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * UpdateBlurbRequest request =
+   *     UpdateBlurbRequest.newBuilder().setBlurb(Blurb.newBuilder().build()).build();
+   * ApiFuture<Blurb> future = messagingClient.updateBlurbCallable().futureCall(request);
+   * // Do something.
+   * Blurb response = future.get();
    * }</pre>
    */
   public final UnaryCallable<UpdateBlurbRequest, Blurb> updateBlurbCallable() {
@@ -1184,10 +1318,14 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   BlurbName name = BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]");
-   *   messagingClient.deleteBlurb(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * BlurbName name = BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]");
+   * messagingClient.deleteBlurb(name);
    * }</pre>
    *
    * @param name
@@ -1209,11 +1347,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String name =
-   *       BlurbName.ofUserLegacyUserBlurbName("[USER]", "[LEGACY_USER]", "[BLURB]").toString();
-   *   messagingClient.deleteBlurb(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String name =
+   *     BlurbName.ofUserLegacyUserBlurbName("[USER]", "[LEGACY_USER]", "[BLURB]").toString();
+   * messagingClient.deleteBlurb(name);
    * }</pre>
    *
    * @param name
@@ -1234,13 +1376,17 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   DeleteBlurbRequest request =
-   *       DeleteBlurbRequest.newBuilder()
-   *           .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
-   *           .build();
-   *   messagingClient.deleteBlurb(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * DeleteBlurbRequest request =
+   *     DeleteBlurbRequest.newBuilder()
+   *         .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
+   *         .build();
+   * messagingClient.deleteBlurb(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1260,15 +1406,19 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   DeleteBlurbRequest request =
-   *       DeleteBlurbRequest.newBuilder()
-   *           .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
-   *           .build();
-   *   ApiFuture<Empty> future = messagingClient.deleteBlurbCallable().futureCall(request);
-   *   // Do something.
-   *   future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * DeleteBlurbRequest request =
+   *     DeleteBlurbRequest.newBuilder()
+   *         .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
+   *         .build();
+   * ApiFuture<Empty> future = messagingClient.deleteBlurbCallable().futureCall(request);
+   * // Do something.
+   * future.get();
    * }</pre>
    */
   public final UnaryCallable<DeleteBlurbRequest, Empty> deleteBlurbCallable() {
@@ -1285,11 +1435,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ProfileName parent = ProfileName.of("[USER]");
-   *   for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ProfileName parent = ProfileName.of("[USER]");
+   * for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -1312,11 +1466,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   RoomName parent = RoomName.of("[ROOM]");
-   *   for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * RoomName parent = RoomName.of("[ROOM]");
+   * for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -1339,11 +1497,15 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String parent = ProfileName.of("[USER]").toString();
-   *   for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String parent = ProfileName.of("[USER]").toString();
+   * for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -1365,16 +1527,20 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ListBlurbsRequest request =
-   *       ListBlurbsRequest.newBuilder()
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (Blurb element : messagingClient.listBlurbs(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ListBlurbsRequest request =
+   *     ListBlurbsRequest.newBuilder()
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * for (Blurb element : messagingClient.listBlurbs(request).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -1395,18 +1561,22 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ListBlurbsRequest request =
-   *       ListBlurbsRequest.newBuilder()
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<Blurb> future = messagingClient.listBlurbsPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (Blurb element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ListBlurbsRequest request =
+   *     ListBlurbsRequest.newBuilder()
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<Blurb> future = messagingClient.listBlurbsPagedCallable().futureCall(request);
+   * // Do something.
+   * for (Blurb element : future.get().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    */
@@ -1424,24 +1594,28 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ListBlurbsRequest request =
-   *       ListBlurbsRequest.newBuilder()
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     ListBlurbsResponse response = messagingClient.listBlurbsCallable().call(request);
-   *     for (Blurb element : response.getBlurbsList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ListBlurbsRequest request =
+   *     ListBlurbsRequest.newBuilder()
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * while (true) {
+   *   ListBlurbsResponse response = messagingClient.listBlurbsCallable().call(request);
+   *   for (Blurb element : response.getBlurbsList()) {
+   *     // doThingsWith(element);
+   *   }
+   *   String nextPageToken = response.getNextPageToken();
+   *   if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *     request = request.toBuilder().setPageToken(nextPageToken).build();
+   *   } else {
+   *     break;
    *   }
    * }
    * }</pre>
@@ -1460,10 +1634,14 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   String query = "query107944136";
-   *   SearchBlurbsResponse response = messagingClient.searchBlurbsAsync(query).get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * String query = "query107944136";
+   * SearchBlurbsResponse response = messagingClient.searchBlurbsAsync(query).get();
    * }</pre>
    *
    * @param query
@@ -1485,16 +1663,20 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   SearchBlurbsRequest request =
-   *       SearchBlurbsRequest.newBuilder()
-   *           .setQuery("query107944136")
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   SearchBlurbsResponse response = messagingClient.searchBlurbsAsync(request).get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * SearchBlurbsRequest request =
+   *     SearchBlurbsRequest.newBuilder()
+   *         .setQuery("query107944136")
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * SearchBlurbsResponse response = messagingClient.searchBlurbsAsync(request).get();
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1515,19 +1697,23 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   SearchBlurbsRequest request =
-   *       SearchBlurbsRequest.newBuilder()
-   *           .setQuery("query107944136")
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   OperationFuture<SearchBlurbsResponse, SearchBlurbsMetadata> future =
-   *       messagingClient.searchBlurbsOperationCallable().futureCall(request);
-   *   // Do something.
-   *   SearchBlurbsResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * SearchBlurbsRequest request =
+   *     SearchBlurbsRequest.newBuilder()
+   *         .setQuery("query107944136")
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * OperationFuture<SearchBlurbsResponse, SearchBlurbsMetadata> future =
+   *     messagingClient.searchBlurbsOperationCallable().futureCall(request);
+   * // Do something.
+   * SearchBlurbsResponse response = future.get();
    * }</pre>
    */
   public final OperationCallable<SearchBlurbsRequest, SearchBlurbsResponse, SearchBlurbsMetadata>
@@ -1545,18 +1731,22 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   SearchBlurbsRequest request =
-   *       SearchBlurbsRequest.newBuilder()
-   *           .setQuery("query107944136")
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<Operation> future = messagingClient.searchBlurbsCallable().futureCall(request);
-   *   // Do something.
-   *   Operation response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * SearchBlurbsRequest request =
+   *     SearchBlurbsRequest.newBuilder()
+   *         .setQuery("query107944136")
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<Operation> future = messagingClient.searchBlurbsCallable().futureCall(request);
+   * // Do something.
+   * Operation response = future.get();
    * }</pre>
    */
   public final UnaryCallable<SearchBlurbsRequest, Operation> searchBlurbsCallable() {
@@ -1573,14 +1763,18 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   StreamBlurbsRequest request =
-   *       StreamBlurbsRequest.newBuilder().setName(ProfileName.of("[USER]").toString()).build();
-   *   ServerStream<StreamBlurbsResponse> stream =
-   *       messagingClient.streamBlurbsCallable().call(request);
-   *   for (StreamBlurbsResponse response : stream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * StreamBlurbsRequest request =
+   *     StreamBlurbsRequest.newBuilder().setName(ProfileName.of("[USER]").toString()).build();
+   * ServerStream<StreamBlurbsResponse> stream =
+   *     messagingClient.streamBlurbsCallable().call(request);
+   * for (StreamBlurbsResponse response : stream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -1599,33 +1793,37 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   ApiStreamObserver<CreateBlurbRequest> responseObserver =
-   *       new ApiStreamObserver<CreateBlurbRequest>() {
-   *         {@literal @}Override
-   *         public void onNext(SendBlurbsResponse response) {
-   *           // Do something when a response is received.
-   *         }
-   *
-   *         {@literal @}Override
-   *         public void onError(Throwable t) {
-   *           // Add error-handling
-   *         }
-   *
-   *         {@literal @}Override
-   *         public void onCompleted() {
-   *           // Do something when complete.
-   *         }
-   *       };
-   *   ApiStreamObserver<CreateBlurbRequest> requestObserver =
-   *       messagingClient.sendBlurbs().clientStreamingCall(responseObserver);
-   *   CreateBlurbRequest request =
-   *       CreateBlurbRequest.newBuilder()
-   *           .setParent(ProfileName.of("[USER]").toString())
-   *           .setBlurb(Blurb.newBuilder().build())
-   *           .build();
-   *   requestObserver.onNext(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * ApiStreamObserver<CreateBlurbRequest> responseObserver =
+   *     new ApiStreamObserver<CreateBlurbRequest>() {
+   *       {@literal @}Override
+   *       public void onNext(SendBlurbsResponse response) {
+   *         // Do something when a response is received.
+   *       }
+   *
+   *       {@literal @}Override
+   *       public void onError(Throwable t) {
+   *         // Add error-handling
+   *       }
+   *
+   *       {@literal @}Override
+   *       public void onCompleted() {
+   *         // Do something when complete.
+   *       }
+   *     };
+   * ApiStreamObserver<CreateBlurbRequest> requestObserver =
+   *     messagingClient.sendBlurbs().clientStreamingCall(responseObserver);
+   * CreateBlurbRequest request =
+   *     CreateBlurbRequest.newBuilder()
+   *         .setParent(ProfileName.of("[USER]").toString())
+   *         .setBlurb(Blurb.newBuilder().build())
+   *         .build();
+   * requestObserver.onNext(request);
    * }</pre>
    */
   public final ClientStreamingCallable<CreateBlurbRequest, SendBlurbsResponse>
@@ -1643,14 +1841,18 @@ public class MessagingClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (MessagingClient messagingClient = MessagingClient.create()) {
-   *   BidiStream<ConnectRequest, StreamBlurbsResponse> bidiStream =
-   *       messagingClient.connectCallable().call();
-   *   ConnectRequest request = ConnectRequest.newBuilder().build();
-   *   bidiStream.send(request);
-   *   for (StreamBlurbsResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * MessagingClient messagingClient = MessagingClient.create();
+   * BidiStream<ConnectRequest, StreamBlurbsResponse> bidiStream =
+   *     messagingClient.connectCallable().call();
+   * ConnectRequest request = ConnectRequest.newBuilder().build();
+   * bidiStream.send(request);
+   * for (StreamBlurbsResponse response : bidiStream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/AsyncGetBook.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/AsyncGetBook.golden
index 94239b0ccb5d..6212019d2475 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/AsyncGetBook.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/AsyncGetBook.golden
@@ -35,17 +35,21 @@ public class AsyncGetBook {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (BookshopClient bookshopClient = BookshopClient.create()) {
-      GetBookRequest request =
-          GetBookRequest.newBuilder()
-              .setBooksCount1(1618425911)
-              .setBooksList2("booksList2-1119589686")
-              .addAllBooks3(new ArrayList<Book>())
-              .build();
-      ApiFuture<Book> future = bookshopClient.getBookCallable().futureCall(request);
-      // Do something.
-      Book response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    BookshopClient bookshopClient = BookshopClient.create();
+    GetBookRequest request =
+        GetBookRequest.newBuilder()
+            .setBooksCount1(1618425911)
+            .setBooksList2("booksList2-1119589686")
+            .addAllBooks3(new ArrayList<Book>())
+            .build();
+    ApiFuture<Book> future = bookshopClient.getBookCallable().futureCall(request);
+    // Do something.
+    Book response = future.get();
   }
 }
 // [END goldensample_generated_Bookshop_GetBook_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncCreateSetCredentialsProvider.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncCreateSetCredentialsProvider.golden
index 1743583f3a15..f7a6b1de87a8 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncCreateSetCredentialsProvider.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncCreateSetCredentialsProvider.golden
@@ -34,6 +34,11 @@ public class SyncCreateSetCredentialsProvider {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     BookshopSettings bookshopSettings =
         BookshopSettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncCreateSetEndpoint.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncCreateSetEndpoint.golden
index 021437279afd..bf46cb56a8af 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncCreateSetEndpoint.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncCreateSetEndpoint.golden
@@ -33,6 +33,11 @@ public class SyncCreateSetEndpoint {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     BookshopSettings bookshopSettings =
         BookshopSettings.newBuilder().setEndpoint(myEndpoint).build();
     BookshopClient bookshopClient = BookshopClient.create(bookshopSettings);
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBook.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBook.golden
index 7d3b2bcbeb13..5392b610a209 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBook.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBook.golden
@@ -34,15 +34,19 @@ public class SyncGetBook {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (BookshopClient bookshopClient = BookshopClient.create()) {
-      GetBookRequest request =
-          GetBookRequest.newBuilder()
-              .setBooksCount1(1618425911)
-              .setBooksList2("booksList2-1119589686")
-              .addAllBooks3(new ArrayList<Book>())
-              .build();
-      Book response = bookshopClient.getBook(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    BookshopClient bookshopClient = BookshopClient.create();
+    GetBookRequest request =
+        GetBookRequest.newBuilder()
+            .setBooksCount1(1618425911)
+            .setBooksList2("booksList2-1119589686")
+            .addAllBooks3(new ArrayList<Book>())
+            .build();
+    Book response = bookshopClient.getBook(request);
   }
 }
 // [END goldensample_generated_Bookshop_GetBook_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBookIntListbook.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBookIntListbook.golden
index 7a6f9db7ab51..6db40010ec1d 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBookIntListbook.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBookIntListbook.golden
@@ -34,11 +34,15 @@ public class SyncGetBookIntListbook {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (BookshopClient bookshopClient = BookshopClient.create()) {
-      int booksCount = 1618425911;
-      List<Book> books = new ArrayList<>();
-      Book response = bookshopClient.getBook(booksCount, books);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    BookshopClient bookshopClient = BookshopClient.create();
+    int booksCount = 1618425911;
+    List<Book> books = new ArrayList<>();
+    Book response = bookshopClient.getBook(booksCount, books);
   }
 }
 // [END goldensample_generated_Bookshop_GetBook_IntListbook_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBookStringListbook.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBookStringListbook.golden
index a2d3ceaabaaf..ee4d4beb7e69 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBookStringListbook.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/bookshopclient/SyncGetBookStringListbook.golden
@@ -34,11 +34,15 @@ public class SyncGetBookStringListbook {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (BookshopClient bookshopClient = BookshopClient.create()) {
-      String booksList = "booksList2-1119589686";
-      List<Book> books = new ArrayList<>();
-      Book response = bookshopClient.getBook(booksList, books);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    BookshopClient bookshopClient = BookshopClient.create();
+    String booksList = "booksList2-1119589686";
+    List<Book> books = new ArrayList<>();
+    Book response = bookshopClient.getBook(booksList, books);
   }
 }
 // [END goldensample_generated_Bookshop_GetBook_StringListbook_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/AsyncFastFibonacci.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/AsyncFastFibonacci.golden
index dbe0565f8fe5..1b04bc7d7acc 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/AsyncFastFibonacci.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/AsyncFastFibonacci.golden
@@ -34,12 +34,16 @@ public class AsyncFastFibonacci {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
-      FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
-      ApiFuture<Empty> future = deprecatedServiceClient.fastFibonacciCallable().futureCall(request);
-      // Do something.
-      future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+    FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+    ApiFuture<Empty> future = deprecatedServiceClient.fastFibonacciCallable().futureCall(request);
+    // Do something.
+    future.get();
   }
 }
 // [END goldensample_generated_DeprecatedService_FastFibonacci_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/AsyncSlowFibonacci.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/AsyncSlowFibonacci.golden
index 1c2973890eb8..313e5f9463c5 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/AsyncSlowFibonacci.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/AsyncSlowFibonacci.golden
@@ -34,12 +34,16 @@ public class AsyncSlowFibonacci {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
-      FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
-      ApiFuture<Empty> future = deprecatedServiceClient.slowFibonacciCallable().futureCall(request);
-      // Do something.
-      future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+    FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+    ApiFuture<Empty> future = deprecatedServiceClient.slowFibonacciCallable().futureCall(request);
+    // Do something.
+    future.get();
   }
 }
 // [END goldensample_generated_DeprecatedService_SlowFibonacci_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncCreateSetCredentialsProvider.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncCreateSetCredentialsProvider.golden
index 6b530479adc2..3701fe09f734 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncCreateSetCredentialsProvider.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncCreateSetCredentialsProvider.golden
@@ -34,6 +34,11 @@ public class SyncCreateSetCredentialsProvider {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     DeprecatedServiceSettings deprecatedServiceSettings =
         DeprecatedServiceSettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncCreateSetEndpoint.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncCreateSetEndpoint.golden
index d688b1c89dc5..0971780c821d 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncCreateSetEndpoint.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncCreateSetEndpoint.golden
@@ -33,6 +33,11 @@ public class SyncCreateSetEndpoint {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     DeprecatedServiceSettings deprecatedServiceSettings =
         DeprecatedServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
     DeprecatedServiceClient deprecatedServiceClient =
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncFastFibonacci.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncFastFibonacci.golden
index e65a153f67ac..cba081238747 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncFastFibonacci.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncFastFibonacci.golden
@@ -33,10 +33,14 @@ public class SyncFastFibonacci {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
-      FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
-      deprecatedServiceClient.fastFibonacci(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+    FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+    deprecatedServiceClient.fastFibonacci(request);
   }
 }
 // [END goldensample_generated_DeprecatedService_FastFibonacci_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncSlowFibonacci.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncSlowFibonacci.golden
index 84c260ec2822..6b861c353ec5 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncSlowFibonacci.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/deprecatedserviceclient/SyncSlowFibonacci.golden
@@ -33,10 +33,14 @@ public class SyncSlowFibonacci {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create()) {
-      FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
-      deprecatedServiceClient.slowFibonacci(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    DeprecatedServiceClient deprecatedServiceClient = DeprecatedServiceClient.create();
+    FibonacciRequest request = FibonacciRequest.newBuilder().setValue(111972721).build();
+    deprecatedServiceClient.slowFibonacci(request);
   }
 }
 // [END goldensample_generated_DeprecatedService_SlowFibonacci_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncBlock.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncBlock.golden
index eab80046e53c..1e64144423f8 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncBlock.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncBlock.golden
@@ -34,12 +34,16 @@ public class AsyncBlock {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      BlockRequest request = BlockRequest.newBuilder().build();
-      ApiFuture<BlockResponse> future = echoClient.blockCallable().futureCall(request);
-      // Do something.
-      BlockResponse response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    BlockRequest request = BlockRequest.newBuilder().build();
+    ApiFuture<BlockResponse> future = echoClient.blockCallable().futureCall(request);
+    // Do something.
+    BlockResponse response = future.get();
   }
 }
 // [END goldensample_generated_Echo_Block_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncChat.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncChat.golden
index e4730a1d9a26..9750a913090f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncChat.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncChat.golden
@@ -37,19 +37,23 @@ public class AsyncChat {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatCallable().call();
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setSeverity(Severity.forNumber(0))
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      bidiStream.send(request);
-      for (EchoResponse response : bidiStream) {
-        // Do something when a response is received.
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatCallable().call();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setSeverity(Severity.forNumber(0))
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    bidiStream.send(request);
+    for (EchoResponse response : bidiStream) {
+      // Do something when a response is received.
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncChatAgain.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncChatAgain.golden
index 423a7c38d256..dcf3fe5ac8c4 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncChatAgain.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncChatAgain.golden
@@ -37,19 +37,23 @@ public class AsyncChatAgain {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatAgainCallable().call();
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setSeverity(Severity.forNumber(0))
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      bidiStream.send(request);
-      for (EchoResponse response : bidiStream) {
-        // Do something when a response is received.
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatAgainCallable().call();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setSeverity(Severity.forNumber(0))
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    bidiStream.send(request);
+    for (EchoResponse response : bidiStream) {
+      // Do something when a response is received.
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncCollect.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncCollect.golden
index d750b9290bba..694ea5f78808 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncCollect.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncCollect.golden
@@ -37,35 +37,39 @@ public class AsyncCollect {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      ApiStreamObserver<EchoRequest> responseObserver =
-          new ApiStreamObserver<EchoRequest>() {
-            @Override
-            public void onNext(EchoResponse response) {
-              // Do something when a response is received.
-            }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    ApiStreamObserver<EchoRequest> responseObserver =
+        new ApiStreamObserver<EchoRequest>() {
+          @Override
+          public void onNext(EchoResponse response) {
+            // Do something when a response is received.
+          }
 
-            @Override
-            public void onError(Throwable t) {
-              // Add error-handling
-            }
+          @Override
+          public void onError(Throwable t) {
+            // Add error-handling
+          }
 
-            @Override
-            public void onCompleted() {
-              // Do something when complete.
-            }
-          };
-      ApiStreamObserver<EchoRequest> requestObserver =
-          echoClient.collect().clientStreamingCall(responseObserver);
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setSeverity(Severity.forNumber(0))
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      requestObserver.onNext(request);
-    }
+          @Override
+          public void onCompleted() {
+            // Do something when complete.
+          }
+        };
+    ApiStreamObserver<EchoRequest> requestObserver =
+        echoClient.collect().clientStreamingCall(responseObserver);
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setSeverity(Severity.forNumber(0))
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    requestObserver.onNext(request);
   }
 }
 // [END goldensample_generated_Echo_Collect_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncCollideName.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncCollideName.golden
index c25f9a7f945a..38b24ae7c521 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncCollideName.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncCollideName.golden
@@ -37,18 +37,22 @@ public class AsyncCollideName {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setSeverity(Severity.forNumber(0))
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      ApiFuture<Object> future = echoClient.collideNameCallable().futureCall(request);
-      // Do something.
-      Object response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setSeverity(Severity.forNumber(0))
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    ApiFuture<Object> future = echoClient.collideNameCallable().futureCall(request);
+    // Do something.
+    Object response = future.get();
   }
 }
 // [END goldensample_generated_Echo_CollideName_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncEcho.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncEcho.golden
index 0fe243d58238..10d2a40bb5ad 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncEcho.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncEcho.golden
@@ -37,18 +37,22 @@ public class AsyncEcho {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setSeverity(Severity.forNumber(0))
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      ApiFuture<EchoResponse> future = echoClient.echoCallable().futureCall(request);
-      // Do something.
-      EchoResponse response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setSeverity(Severity.forNumber(0))
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    ApiFuture<EchoResponse> future = echoClient.echoCallable().futureCall(request);
+    // Do something.
+    EchoResponse response = future.get();
   }
 }
 // [END goldensample_generated_Echo_Echo_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncExpand.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncExpand.golden
index c9f643ca7143..f9ebf640058f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncExpand.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncExpand.golden
@@ -34,13 +34,17 @@ public class AsyncExpand {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      ExpandRequest request =
-          ExpandRequest.newBuilder().setContent("content951530617").setInfo("info3237038").build();
-      ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);
-      for (EchoResponse response : stream) {
-        // Do something when a response is received.
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    ExpandRequest request =
+        ExpandRequest.newBuilder().setContent("content951530617").setInfo("info3237038").build();
+    ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);
+    for (EchoResponse response : stream) {
+      // Do something when a response is received.
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpand.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpand.golden
index cf324c1945ab..e35b3d41f6d9 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpand.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpand.golden
@@ -34,18 +34,22 @@ public class AsyncPagedExpand {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      PagedExpandRequest request =
-          PagedExpandRequest.newBuilder()
-              .setContent("content951530617")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<EchoResponse> future = echoClient.pagedExpandPagedCallable().futureCall(request);
-      // Do something.
-      for (EchoResponse element : future.get().iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    PagedExpandRequest request =
+        PagedExpandRequest.newBuilder()
+            .setContent("content951530617")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    ApiFuture<EchoResponse> future = echoClient.pagedExpandPagedCallable().futureCall(request);
+    // Do something.
+    for (EchoResponse element : future.get().iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpandLegacy.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpandLegacy.golden
index 04fdf3b93f2c..062398046d3c 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpandLegacy.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpandLegacy.golden
@@ -34,18 +34,22 @@ public class AsyncPagedExpandLegacy {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      PagedExpandLegacyRequest request =
-          PagedExpandLegacyRequest.newBuilder()
-              .setContent("content951530617")
-              .setMaxResults(1128457243)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<PagedExpandResponse> future =
-          echoClient.pagedExpandLegacyCallable().futureCall(request);
-      // Do something.
-      PagedExpandResponse response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    PagedExpandLegacyRequest request =
+        PagedExpandLegacyRequest.newBuilder()
+            .setContent("content951530617")
+            .setMaxResults(1128457243)
+            .setPageToken("pageToken873572522")
+            .build();
+    ApiFuture<PagedExpandResponse> future =
+        echoClient.pagedExpandLegacyCallable().futureCall(request);
+    // Do something.
+    PagedExpandResponse response = future.get();
   }
 }
 // [END goldensample_generated_Echo_PagedExpandLegacy_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpandPaged.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpandPaged.golden
index 70c49d52758a..830d4708a60e 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpandPaged.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncPagedExpandPaged.golden
@@ -35,24 +35,28 @@ public class AsyncPagedExpandPaged {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      PagedExpandRequest request =
-          PagedExpandRequest.newBuilder()
-              .setContent("content951530617")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      while (true) {
-        PagedExpandResponse response = echoClient.pagedExpandCallable().call(request);
-        for (EchoResponse element : response.getResponsesList()) {
-          // doThingsWith(element);
-        }
-        String nextPageToken = response.getNextPageToken();
-        if (!Strings.isNullOrEmpty(nextPageToken)) {
-          request = request.toBuilder().setPageToken(nextPageToken).build();
-        } else {
-          break;
-        }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    PagedExpandRequest request =
+        PagedExpandRequest.newBuilder()
+            .setContent("content951530617")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    while (true) {
+      PagedExpandResponse response = echoClient.pagedExpandCallable().call(request);
+      for (EchoResponse element : response.getResponsesList()) {
+        // doThingsWith(element);
+      }
+      String nextPageToken = response.getNextPageToken();
+      if (!Strings.isNullOrEmpty(nextPageToken)) {
+        request = request.toBuilder().setPageToken(nextPageToken).build();
+      } else {
+        break;
       }
     }
   }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncSimplePagedExpand.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncSimplePagedExpand.golden
index 308cb10bd296..1ee83046ce93 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncSimplePagedExpand.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncSimplePagedExpand.golden
@@ -34,19 +34,23 @@ public class AsyncSimplePagedExpand {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      PagedExpandRequest request =
-          PagedExpandRequest.newBuilder()
-              .setContent("content951530617")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<EchoResponse> future =
-          echoClient.simplePagedExpandPagedCallable().futureCall(request);
-      // Do something.
-      for (EchoResponse element : future.get().iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    PagedExpandRequest request =
+        PagedExpandRequest.newBuilder()
+            .setContent("content951530617")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    ApiFuture<EchoResponse> future =
+        echoClient.simplePagedExpandPagedCallable().futureCall(request);
+    // Do something.
+    for (EchoResponse element : future.get().iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncSimplePagedExpandPaged.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncSimplePagedExpandPaged.golden
index 2f1be8aba179..5b8fba5e8cd0 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncSimplePagedExpandPaged.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncSimplePagedExpandPaged.golden
@@ -35,24 +35,28 @@ public class AsyncSimplePagedExpandPaged {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      PagedExpandRequest request =
-          PagedExpandRequest.newBuilder()
-              .setContent("content951530617")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      while (true) {
-        PagedExpandResponse response = echoClient.simplePagedExpandCallable().call(request);
-        for (EchoResponse element : response.getResponsesList()) {
-          // doThingsWith(element);
-        }
-        String nextPageToken = response.getNextPageToken();
-        if (!Strings.isNullOrEmpty(nextPageToken)) {
-          request = request.toBuilder().setPageToken(nextPageToken).build();
-        } else {
-          break;
-        }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    PagedExpandRequest request =
+        PagedExpandRequest.newBuilder()
+            .setContent("content951530617")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    while (true) {
+      PagedExpandResponse response = echoClient.simplePagedExpandCallable().call(request);
+      for (EchoResponse element : response.getResponsesList()) {
+        // doThingsWith(element);
+      }
+      String nextPageToken = response.getNextPageToken();
+      if (!Strings.isNullOrEmpty(nextPageToken)) {
+        request = request.toBuilder().setPageToken(nextPageToken).build();
+      } else {
+        break;
       }
     }
   }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncWait.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncWait.golden
index d416fb42d06f..a2f64b317116 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncWait.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncWait.golden
@@ -34,12 +34,16 @@ public class AsyncWait {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      WaitRequest request = WaitRequest.newBuilder().build();
-      ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);
-      // Do something.
-      Operation response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    WaitRequest request = WaitRequest.newBuilder().build();
+    ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);
+    // Do something.
+    Operation response = future.get();
   }
 }
 // [END goldensample_generated_Echo_Wait_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncWaitLRO.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncWaitLRO.golden
index 08b3dbe42d00..eb48929cbbe5 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncWaitLRO.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/AsyncWaitLRO.golden
@@ -35,13 +35,17 @@ public class AsyncWaitLRO {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      WaitRequest request = WaitRequest.newBuilder().build();
-      OperationFuture<WaitResponse, WaitMetadata> future =
-          echoClient.waitOperationCallable().futureCall(request);
-      // Do something.
-      WaitResponse response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    WaitRequest request = WaitRequest.newBuilder().build();
+    OperationFuture<WaitResponse, WaitMetadata> future =
+        echoClient.waitOperationCallable().futureCall(request);
+    // Do something.
+    WaitResponse response = future.get();
   }
 }
 // [END goldensample_generated_Echo_Wait_LRO_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncBlock.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncBlock.golden
index fbb92823b123..ca702684005b 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncBlock.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncBlock.golden
@@ -33,10 +33,14 @@ public class SyncBlock {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      BlockRequest request = BlockRequest.newBuilder().build();
-      BlockResponse response = echoClient.block(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    BlockRequest request = BlockRequest.newBuilder().build();
+    BlockResponse response = echoClient.block(request);
   }
 }
 // [END goldensample_generated_Echo_Block_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCollideName.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCollideName.golden
index 47b8b4308662..62700749a6a2 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCollideName.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCollideName.golden
@@ -36,16 +36,20 @@ public class SyncCollideName {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setSeverity(Severity.forNumber(0))
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      Object response = echoClient.collideName(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setSeverity(Severity.forNumber(0))
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    Object response = echoClient.collideName(request);
   }
 }
 // [END goldensample_generated_Echo_CollideName_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCreateSetCredentialsProvider.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCreateSetCredentialsProvider.golden
index 4eb818756094..91004f3837b2 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCreateSetCredentialsProvider.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCreateSetCredentialsProvider.golden
@@ -34,6 +34,11 @@ public class SyncCreateSetCredentialsProvider {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoSettings echoSettings =
         EchoSettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCreateSetEndpoint.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCreateSetEndpoint.golden
index 1f5a8f82aef7..69cfbda73865 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCreateSetEndpoint.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncCreateSetEndpoint.golden
@@ -33,6 +33,11 @@ public class SyncCreateSetEndpoint {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoSettings echoSettings = EchoSettings.newBuilder().setEndpoint(myEndpoint).build();
     EchoClient echoClient = EchoClient.create(echoSettings);
   }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEcho.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEcho.golden
index e5de2abc5450..f3fda8fa9759 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEcho.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEcho.golden
@@ -36,16 +36,20 @@ public class SyncEcho {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-              .setSeverity(Severity.forNumber(0))
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      EchoResponse response = echoClient.echo(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+            .setSeverity(Severity.forNumber(0))
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    EchoResponse response = echoClient.echo(request);
   }
 }
 // [END goldensample_generated_Echo_Echo_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoFoobarname.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoFoobarname.golden
index 1ee28149d482..9510f23560dc 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoFoobarname.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoFoobarname.golden
@@ -33,10 +33,14 @@ public class SyncEchoFoobarname {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      FoobarName name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
-      EchoResponse response = echoClient.echo(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    FoobarName name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
+    EchoResponse response = echoClient.echo(name);
   }
 }
 // [END goldensample_generated_Echo_Echo_Foobarname_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoNoargs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoNoargs.golden
index cc5dbeedb87a..abd21561db2a 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoNoargs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoNoargs.golden
@@ -32,9 +32,13 @@ public class SyncEchoNoargs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      EchoResponse response = echoClient.echo();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    EchoResponse response = echoClient.echo();
   }
 }
 // [END goldensample_generated_Echo_Echo_Noargs_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoResourcename.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoResourcename.golden
index 5233fe9bdd25..f446d7557ab1 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoResourcename.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoResourcename.golden
@@ -34,10 +34,14 @@ public class SyncEchoResourcename {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      ResourceName parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
-      EchoResponse response = echoClient.echo(parent);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    ResourceName parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
+    EchoResponse response = echoClient.echo(parent);
   }
 }
 // [END goldensample_generated_Echo_Echo_Resourcename_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoStatus.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoStatus.golden
index 32a897cc33bc..b4a41483d215 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoStatus.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoStatus.golden
@@ -33,10 +33,14 @@ public class SyncEchoStatus {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      Status error = Status.newBuilder().build();
-      EchoResponse response = echoClient.echo(error);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    Status error = Status.newBuilder().build();
+    EchoResponse response = echoClient.echo(error);
   }
 }
 // [END goldensample_generated_Echo_Echo_Status_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString.golden
index 43b2a7c26ebd..13201d200fc3 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString.golden
@@ -32,10 +32,14 @@ public class SyncEchoString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      String content = "content951530617";
-      EchoResponse response = echoClient.echo(content);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    String content = "content951530617";
+    EchoResponse response = echoClient.echo(content);
   }
 }
 // [END goldensample_generated_Echo_Echo_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString1.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString1.golden
index 7e2c89d8ae7e..6b3e2ce58ebe 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString1.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString1.golden
@@ -33,10 +33,14 @@ public class SyncEchoString1 {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      String name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
-      EchoResponse response = echoClient.echo(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    String name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
+    EchoResponse response = echoClient.echo(name);
   }
 }
 // [END goldensample_generated_Echo_Echo_String1_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString2.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString2.golden
index cdf4a72efc06..a0d6340993b1 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString2.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoString2.golden
@@ -33,10 +33,14 @@ public class SyncEchoString2 {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      String parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
-      EchoResponse response = echoClient.echo(parent);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    String parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
+    EchoResponse response = echoClient.echo(parent);
   }
 }
 // [END goldensample_generated_Echo_Echo_String2_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoStringSeverity.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoStringSeverity.golden
index d6f42b862f44..9d8aa41e7f06 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoStringSeverity.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncEchoStringSeverity.golden
@@ -33,11 +33,15 @@ public class SyncEchoStringSeverity {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      String content = "content951530617";
-      Severity severity = Severity.forNumber(0);
-      EchoResponse response = echoClient.echo(content, severity);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    String content = "content951530617";
+    Severity severity = Severity.forNumber(0);
+    EchoResponse response = echoClient.echo(content, severity);
   }
 }
 // [END goldensample_generated_Echo_Echo_StringSeverity_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncPagedExpand.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncPagedExpand.golden
index ba092a99d4a0..12ff06fb244e 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncPagedExpand.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncPagedExpand.golden
@@ -33,16 +33,20 @@ public class SyncPagedExpand {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      PagedExpandRequest request =
-          PagedExpandRequest.newBuilder()
-              .setContent("content951530617")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      for (EchoResponse element : echoClient.pagedExpand(request).iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    PagedExpandRequest request =
+        PagedExpandRequest.newBuilder()
+            .setContent("content951530617")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    for (EchoResponse element : echoClient.pagedExpand(request).iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncPagedExpandLegacy.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncPagedExpandLegacy.golden
index 51a0bad09a91..7690d225873c 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncPagedExpandLegacy.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncPagedExpandLegacy.golden
@@ -33,15 +33,19 @@ public class SyncPagedExpandLegacy {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      PagedExpandLegacyRequest request =
-          PagedExpandLegacyRequest.newBuilder()
-              .setContent("content951530617")
-              .setMaxResults(1128457243)
-              .setPageToken("pageToken873572522")
-              .build();
-      PagedExpandResponse response = echoClient.pagedExpandLegacy(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    PagedExpandLegacyRequest request =
+        PagedExpandLegacyRequest.newBuilder()
+            .setContent("content951530617")
+            .setMaxResults(1128457243)
+            .setPageToken("pageToken873572522")
+            .build();
+    PagedExpandResponse response = echoClient.pagedExpandLegacy(request);
   }
 }
 // [END goldensample_generated_Echo_PagedExpandLegacy_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncSimplePagedExpand.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncSimplePagedExpand.golden
index 0e75e96f3a89..704d286e9595 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncSimplePagedExpand.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncSimplePagedExpand.golden
@@ -33,16 +33,20 @@ public class SyncSimplePagedExpand {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      PagedExpandRequest request =
-          PagedExpandRequest.newBuilder()
-              .setContent("content951530617")
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      for (EchoResponse element : echoClient.simplePagedExpand(request).iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    PagedExpandRequest request =
+        PagedExpandRequest.newBuilder()
+            .setContent("content951530617")
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    for (EchoResponse element : echoClient.simplePagedExpand(request).iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncSimplePagedExpandNoargs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncSimplePagedExpandNoargs.golden
index dab3712556c7..cfbb9d1dfc11 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncSimplePagedExpandNoargs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncSimplePagedExpandNoargs.golden
@@ -32,10 +32,14 @@ public class SyncSimplePagedExpandNoargs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      for (EchoResponse element : echoClient.simplePagedExpand().iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    for (EchoResponse element : echoClient.simplePagedExpand().iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWait.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWait.golden
index 8e25a6f6e7ae..31b08a049301 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWait.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWait.golden
@@ -33,10 +33,14 @@ public class SyncWait {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      WaitRequest request = WaitRequest.newBuilder().build();
-      WaitResponse response = echoClient.waitAsync(request).get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    WaitRequest request = WaitRequest.newBuilder().build();
+    WaitResponse response = echoClient.waitAsync(request).get();
   }
 }
 // [END goldensample_generated_Echo_Wait_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWaitDuration.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWaitDuration.golden
index 04d2f6c4b565..588c53b9cd0e 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWaitDuration.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWaitDuration.golden
@@ -33,10 +33,14 @@ public class SyncWaitDuration {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      Duration ttl = Duration.newBuilder().build();
-      WaitResponse response = echoClient.waitAsync(ttl).get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    Duration ttl = Duration.newBuilder().build();
+    WaitResponse response = echoClient.waitAsync(ttl).get();
   }
 }
 // [END goldensample_generated_Echo_Wait_Duration_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWaitTimestamp.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWaitTimestamp.golden
index 4121227ddaf6..ce6750ce1144 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWaitTimestamp.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoclient/SyncWaitTimestamp.golden
@@ -33,10 +33,14 @@ public class SyncWaitTimestamp {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoClient echoClient = EchoClient.create()) {
-      Timestamp endTime = Timestamp.newBuilder().build();
-      WaitResponse response = echoClient.waitAsync(endTime).get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoClient echoClient = EchoClient.create();
+    Timestamp endTime = Timestamp.newBuilder().build();
+    WaitResponse response = echoClient.waitAsync(endTime).get();
   }
 }
 // [END goldensample_generated_Echo_Wait_Timestamp_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatAgainShouldGenerateAsUsual.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatAgainShouldGenerateAsUsual.golden
index e745bdb237ce..1f1c40f166f7 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatAgainShouldGenerateAsUsual.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatAgainShouldGenerateAsUsual.golden
@@ -36,22 +36,24 @@ public class AsyncChatAgainShouldGenerateAsUsual {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      BidiStream<EchoRequest, EchoResponse> bidiStream =
-          echoServiceShouldGeneratePartialUsualClient
-              .chatAgainShouldGenerateAsUsualCallable()
-              .call();
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      bidiStream.send(request);
-      for (EchoResponse response : bidiStream) {
-        // Do something when a response is received.
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    BidiStream<EchoRequest, EchoResponse> bidiStream =
+        echoServiceShouldGeneratePartialUsualClient.chatAgainShouldGenerateAsUsualCallable().call();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    bidiStream.send(request);
+    for (EchoResponse response : bidiStream) {
+      // Do something when a response is received.
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatShouldGenerateAsInternal.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatShouldGenerateAsInternal.golden
index dca5a1b9f45d..d45b3a1be4c3 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatShouldGenerateAsInternal.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatShouldGenerateAsInternal.golden
@@ -36,21 +36,25 @@ public class AsyncChatShouldGenerateAsInternal {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      ApiFuture<EchoResponse> future =
-          echoServiceShouldGeneratePartialUsualClient
-              .chatShouldGenerateAsInternalCallable()
-              .futureCall(request);
-      // Do something.
-      EchoResponse response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    ApiFuture<EchoResponse> future =
+        echoServiceShouldGeneratePartialUsualClient
+            .chatShouldGenerateAsInternalCallable()
+            .futureCall(request);
+    // Do something.
+    EchoResponse response = future.get();
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_ChatShouldGenerateAsInternal_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatShouldGenerateAsUsual.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatShouldGenerateAsUsual.golden
index 0cbc13407c7e..77fb097cced2 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatShouldGenerateAsUsual.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncChatShouldGenerateAsUsual.golden
@@ -36,20 +36,24 @@ public class AsyncChatShouldGenerateAsUsual {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      BidiStream<EchoRequest, EchoResponse> bidiStream =
-          echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsUsualCallable().call();
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      bidiStream.send(request);
-      for (EchoResponse response : bidiStream) {
-        // Do something when a response is received.
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    BidiStream<EchoRequest, EchoResponse> bidiStream =
+        echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsUsualCallable().call();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    bidiStream.send(request);
+    for (EchoResponse response : bidiStream) {
+      // Do something when a response is received.
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncEchoShouldGenerateAsInternal.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncEchoShouldGenerateAsInternal.golden
index 64d8dd2a4c64..0a218f22e88c 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncEchoShouldGenerateAsInternal.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncEchoShouldGenerateAsInternal.golden
@@ -36,20 +36,24 @@ public class AsyncEchoShouldGenerateAsInternal {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      BidiStream<EchoRequest, EchoResponse> bidiStream =
-          echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsInternalCallable().call();
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      bidiStream.send(request);
-      for (EchoResponse response : bidiStream) {
-        // Do something when a response is received.
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    BidiStream<EchoRequest, EchoResponse> bidiStream =
+        echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsInternalCallable().call();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    bidiStream.send(request);
+    for (EchoResponse response : bidiStream) {
+      // Do something when a response is received.
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncEchoShouldGenerateAsUsual.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncEchoShouldGenerateAsUsual.golden
index ec63a3c5879a..26fd549cba7d 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncEchoShouldGenerateAsUsual.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/AsyncEchoShouldGenerateAsUsual.golden
@@ -36,21 +36,25 @@ public class AsyncEchoShouldGenerateAsUsual {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      ApiFuture<EchoResponse> future =
-          echoServiceShouldGeneratePartialUsualClient
-              .echoShouldGenerateAsUsualCallable()
-              .futureCall(request);
-      // Do something.
-      EchoResponse response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    ApiFuture<EchoResponse> future =
+        echoServiceShouldGeneratePartialUsualClient
+            .echoShouldGenerateAsUsualCallable()
+            .futureCall(request);
+    // Do something.
+    EchoResponse response = future.get();
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_EchoShouldGenerateAsUsual_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternal.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternal.golden
index 18017ebfc302..c6cd088747da 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternal.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternal.golden
@@ -35,17 +35,21 @@ public class SyncChatShouldGenerateAsInternal {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      EchoResponse response =
-          echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    EchoResponse response =
+        echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(request);
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_ChatShouldGenerateAsInternal_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalFoobarname.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalFoobarname.golden
index f217b8f4ef47..c04f937d4148 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalFoobarname.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalFoobarname.golden
@@ -33,12 +33,16 @@ public class SyncChatShouldGenerateAsInternalFoobarname {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      FoobarName name = FoobarName.of("[PROJECT]", "[FOOBAR]");
-      EchoResponse response =
-          echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    FoobarName name = FoobarName.of("[PROJECT]", "[FOOBAR]");
+    EchoResponse response =
+        echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(name);
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_ChatShouldGenerateAsInternal_Foobarname_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalNoargs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalNoargs.golden
index 9b3c95e01785..52760316645b 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalNoargs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalNoargs.golden
@@ -32,11 +32,15 @@ public class SyncChatShouldGenerateAsInternalNoargs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      EchoResponse response =
-          echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    EchoResponse response =
+        echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal();
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_ChatShouldGenerateAsInternal_Noargs_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalString.golden
index 1a0216d16dce..70cbc02c6d1d 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncChatShouldGenerateAsInternalString.golden
@@ -33,12 +33,16 @@ public class SyncChatShouldGenerateAsInternalString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      String name = FoobarName.of("[PROJECT]", "[FOOBAR]").toString();
-      EchoResponse response =
-          echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    String name = FoobarName.of("[PROJECT]", "[FOOBAR]").toString();
+    EchoResponse response =
+        echoServiceShouldGeneratePartialUsualClient.chatShouldGenerateAsInternal(name);
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_ChatShouldGenerateAsInternal_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncCreateSetCredentialsProvider.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncCreateSetCredentialsProvider.golden
index 9ea2dc09f36f..e0ad4593556a 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncCreateSetCredentialsProvider.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncCreateSetCredentialsProvider.golden
@@ -34,6 +34,11 @@ public class SyncCreateSetCredentialsProvider {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoServiceShouldGeneratePartialUsualSettings echoServiceShouldGeneratePartialUsualSettings =
         EchoServiceShouldGeneratePartialUsualSettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncCreateSetEndpoint.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncCreateSetEndpoint.golden
index 1b58cbe1003c..75934f8e7da0 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncCreateSetEndpoint.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncCreateSetEndpoint.golden
@@ -33,6 +33,11 @@ public class SyncCreateSetEndpoint {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoServiceShouldGeneratePartialUsualSettings echoServiceShouldGeneratePartialUsualSettings =
         EchoServiceShouldGeneratePartialUsualSettings.newBuilder().setEndpoint(myEndpoint).build();
     EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsual.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsual.golden
index af978eee1e42..77a813bacb9f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsual.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsual.golden
@@ -35,17 +35,21 @@ public class SyncEchoShouldGenerateAsUsual {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      EchoRequest request =
-          EchoRequest.newBuilder()
-              .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
-              .setFoobar(Foobar.newBuilder().build())
-              .build();
-      EchoResponse response =
-          echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    EchoRequest request =
+        EchoRequest.newBuilder()
+            .setName(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setParent(FoobarName.of("[PROJECT]", "[FOOBAR]").toString())
+            .setFoobar(Foobar.newBuilder().build())
+            .build();
+    EchoResponse response =
+        echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(request);
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_EchoShouldGenerateAsUsual_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualFoobarname.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualFoobarname.golden
index c2e469912a15..e0c3e5cab182 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualFoobarname.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualFoobarname.golden
@@ -33,12 +33,16 @@ public class SyncEchoShouldGenerateAsUsualFoobarname {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      FoobarName name = FoobarName.of("[PROJECT]", "[FOOBAR]");
-      EchoResponse response =
-          echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    FoobarName name = FoobarName.of("[PROJECT]", "[FOOBAR]");
+    EchoResponse response =
+        echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(name);
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_EchoShouldGenerateAsUsual_Foobarname_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualNoargs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualNoargs.golden
index b080af1eb407..77c7e705ada1 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualNoargs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualNoargs.golden
@@ -32,11 +32,14 @@ public class SyncEchoShouldGenerateAsUsualNoargs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      EchoResponse response =
-          echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    EchoResponse response = echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual();
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_EchoShouldGenerateAsUsual_Noargs_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualString.golden
index e4142b60d3f9..67fb0f1d10e5 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/echoserviceselectivegapicclient/SyncEchoShouldGenerateAsUsualString.golden
@@ -33,12 +33,16 @@ public class SyncEchoShouldGenerateAsUsualString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
-        EchoServiceShouldGeneratePartialUsualClient.create()) {
-      String name = FoobarName.of("[PROJECT]", "[FOOBAR]").toString();
-      EchoResponse response =
-          echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    EchoServiceShouldGeneratePartialUsualClient echoServiceShouldGeneratePartialUsualClient =
+        EchoServiceShouldGeneratePartialUsualClient.create();
+    String name = FoobarName.of("[PROJECT]", "[FOOBAR]").toString();
+    EchoResponse response =
+        echoServiceShouldGeneratePartialUsualClient.echoShouldGenerateAsUsual(name);
   }
 }
 // [END goldensample_generated_EchoServiceShouldGeneratePartialUsual_EchoShouldGenerateAsUsual_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncCreateUser.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncCreateUser.golden
index 0a4e2fabc1cf..a1262a3cd353 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncCreateUser.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncCreateUser.golden
@@ -35,16 +35,20 @@ public class AsyncCreateUser {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      CreateUserRequest request =
-          CreateUserRequest.newBuilder()
-              .setParent(UserName.of("[USER]").toString())
-              .setUser(User.newBuilder().build())
-              .build();
-      ApiFuture<User> future = identityClient.createUserCallable().futureCall(request);
-      // Do something.
-      User response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    CreateUserRequest request =
+        CreateUserRequest.newBuilder()
+            .setParent(UserName.of("[USER]").toString())
+            .setUser(User.newBuilder().build())
+            .build();
+    ApiFuture<User> future = identityClient.createUserCallable().futureCall(request);
+    // Do something.
+    User response = future.get();
   }
 }
 // [END goldensample_generated_Identity_CreateUser_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncDeleteUser.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncDeleteUser.golden
index b83b71205464..1d1746db28ef 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncDeleteUser.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncDeleteUser.golden
@@ -35,13 +35,17 @@ public class AsyncDeleteUser {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      DeleteUserRequest request =
-          DeleteUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
-      ApiFuture<Empty> future = identityClient.deleteUserCallable().futureCall(request);
-      // Do something.
-      future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    DeleteUserRequest request =
+        DeleteUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
+    ApiFuture<Empty> future = identityClient.deleteUserCallable().futureCall(request);
+    // Do something.
+    future.get();
   }
 }
 // [END goldensample_generated_Identity_DeleteUser_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncGetUser.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncGetUser.golden
index aaac81aa05af..cdba9027fe42 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncGetUser.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncGetUser.golden
@@ -35,13 +35,17 @@ public class AsyncGetUser {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      GetUserRequest request =
-          GetUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
-      ApiFuture<User> future = identityClient.getUserCallable().futureCall(request);
-      // Do something.
-      User response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    GetUserRequest request =
+        GetUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
+    ApiFuture<User> future = identityClient.getUserCallable().futureCall(request);
+    // Do something.
+    User response = future.get();
   }
 }
 // [END goldensample_generated_Identity_GetUser_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncListUsers.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncListUsers.golden
index 00dd35665fc5..6aa1a0e231d4 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncListUsers.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncListUsers.golden
@@ -34,17 +34,21 @@ public class AsyncListUsers {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      ListUsersRequest request =
-          ListUsersRequest.newBuilder()
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<User> future = identityClient.listUsersPagedCallable().futureCall(request);
-      // Do something.
-      for (User element : future.get().iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    ListUsersRequest request =
+        ListUsersRequest.newBuilder()
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    ApiFuture<User> future = identityClient.listUsersPagedCallable().futureCall(request);
+    // Do something.
+    for (User element : future.get().iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncListUsersPaged.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncListUsersPaged.golden
index 820c403e3328..8a071f6d76d0 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncListUsersPaged.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncListUsersPaged.golden
@@ -35,23 +35,27 @@ public class AsyncListUsersPaged {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      ListUsersRequest request =
-          ListUsersRequest.newBuilder()
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      while (true) {
-        ListUsersResponse response = identityClient.listUsersCallable().call(request);
-        for (User element : response.getUsersList()) {
-          // doThingsWith(element);
-        }
-        String nextPageToken = response.getNextPageToken();
-        if (!Strings.isNullOrEmpty(nextPageToken)) {
-          request = request.toBuilder().setPageToken(nextPageToken).build();
-        } else {
-          break;
-        }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    ListUsersRequest request =
+        ListUsersRequest.newBuilder()
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    while (true) {
+      ListUsersResponse response = identityClient.listUsersCallable().call(request);
+      for (User element : response.getUsersList()) {
+        // doThingsWith(element);
+      }
+      String nextPageToken = response.getNextPageToken();
+      if (!Strings.isNullOrEmpty(nextPageToken)) {
+        request = request.toBuilder().setPageToken(nextPageToken).build();
+      } else {
+        break;
       }
     }
   }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncUpdateUser.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncUpdateUser.golden
index 20023408585a..53ce6d6c2a6d 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncUpdateUser.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/AsyncUpdateUser.golden
@@ -34,13 +34,17 @@ public class AsyncUpdateUser {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      UpdateUserRequest request =
-          UpdateUserRequest.newBuilder().setUser(User.newBuilder().build()).build();
-      ApiFuture<User> future = identityClient.updateUserCallable().futureCall(request);
-      // Do something.
-      User response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    UpdateUserRequest request =
+        UpdateUserRequest.newBuilder().setUser(User.newBuilder().build()).build();
+    ApiFuture<User> future = identityClient.updateUserCallable().futureCall(request);
+    // Do something.
+    User response = future.get();
   }
 }
 // [END goldensample_generated_Identity_UpdateUser_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateSetCredentialsProvider.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateSetCredentialsProvider.golden
index 222ed7a2eb87..1bbe672b88af 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateSetCredentialsProvider.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateSetCredentialsProvider.golden
@@ -34,6 +34,11 @@ public class SyncCreateSetCredentialsProvider {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     IdentitySettings identitySettings =
         IdentitySettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateSetEndpoint.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateSetEndpoint.golden
index d61a0b2f9595..b25a0f7eb18d 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateSetEndpoint.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateSetEndpoint.golden
@@ -33,6 +33,11 @@ public class SyncCreateSetEndpoint {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     IdentitySettings identitySettings =
         IdentitySettings.newBuilder().setEndpoint(myEndpoint).build();
     IdentityClient identityClient = IdentityClient.create(identitySettings);
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUser.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUser.golden
index c199e8ae8ff7..11f70b6ad790 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUser.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUser.golden
@@ -34,14 +34,18 @@ public class SyncCreateUser {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      CreateUserRequest request =
-          CreateUserRequest.newBuilder()
-              .setParent(UserName.of("[USER]").toString())
-              .setUser(User.newBuilder().build())
-              .build();
-      User response = identityClient.createUser(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    CreateUserRequest request =
+        CreateUserRequest.newBuilder()
+            .setParent(UserName.of("[USER]").toString())
+            .setUser(User.newBuilder().build())
+            .build();
+    User response = identityClient.createUser(request);
   }
 }
 // [END goldensample_generated_Identity_CreateUser_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringString.golden
index c607200a90cf..1a6dae6ff168 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringString.golden
@@ -33,12 +33,16 @@ public class SyncCreateUserStringStringString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      String parent = UserName.of("[USER]").toString();
-      String displayName = "displayName1714148973";
-      String email = "email96619420";
-      User response = identityClient.createUser(parent, displayName, email);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    String parent = UserName.of("[USER]").toString();
+    String displayName = "displayName1714148973";
+    String email = "email96619420";
+    User response = identityClient.createUser(parent, displayName, email);
   }
 }
 // [END goldensample_generated_Identity_CreateUser_StringStringString_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringStringIntStringBooleanDouble.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringStringIntStringBooleanDouble.golden
index f2fd7d1c2231..e059e2365337 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringStringIntStringBooleanDouble.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringStringIntStringBooleanDouble.golden
@@ -33,18 +33,22 @@ public class SyncCreateUserStringStringStringIntStringBooleanDouble {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      String parent = UserName.of("[USER]").toString();
-      String displayName = "displayName1714148973";
-      String email = "email96619420";
-      int age = 96511;
-      String nickname = "nickname70690926";
-      boolean enableNotifications = true;
-      double heightFeet = -1032737338;
-      User response =
-          identityClient.createUser(
-              parent, displayName, email, age, nickname, enableNotifications, heightFeet);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    String parent = UserName.of("[USER]").toString();
+    String displayName = "displayName1714148973";
+    String email = "email96619420";
+    int age = 96511;
+    String nickname = "nickname70690926";
+    boolean enableNotifications = true;
+    double heightFeet = -1032737338;
+    User response =
+        identityClient.createUser(
+            parent, displayName, email, age, nickname, enableNotifications, heightFeet);
   }
 }
 // [END goldensample_generated_Identity_CreateUser_StringStringStringIntStringBooleanDouble_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringStringStringStringIntStringStringStringString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringStringStringStringIntStringStringStringString.golden
index 3edeac6779f8..2f1d138fb11a 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringStringStringStringIntStringStringStringString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncCreateUserStringStringStringStringStringIntStringStringStringString.golden
@@ -34,30 +34,34 @@ public class SyncCreateUserStringStringStringStringStringIntStringStringStringSt
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      String parent = UserName.of("[USER]").toString();
-      String displayName = "displayName1714148973";
-      String email = "email96619420";
-      String hobbyName = "hobbyName882586493";
-      String songName = "songName1535136064";
-      int weeklyFrequency = 1572999966;
-      String companyName = "companyName-508582744";
-      String title = "title110371416";
-      String subject = "subject-1867885268";
-      String artistName = "artistName629723762";
-      User response =
-          identityClient.createUser(
-              parent,
-              displayName,
-              email,
-              hobbyName,
-              songName,
-              weeklyFrequency,
-              companyName,
-              title,
-              subject,
-              artistName);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    String parent = UserName.of("[USER]").toString();
+    String displayName = "displayName1714148973";
+    String email = "email96619420";
+    String hobbyName = "hobbyName882586493";
+    String songName = "songName1535136064";
+    int weeklyFrequency = 1572999966;
+    String companyName = "companyName-508582744";
+    String title = "title110371416";
+    String subject = "subject-1867885268";
+    String artistName = "artistName629723762";
+    User response =
+        identityClient.createUser(
+            parent,
+            displayName,
+            email,
+            hobbyName,
+            songName,
+            weeklyFrequency,
+            companyName,
+            title,
+            subject,
+            artistName);
   }
 }
 // [END goldensample_generated_Identity_CreateUser_StringStringStringStringStringIntStringStringStringString_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUser.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUser.golden
index c410fe13670d..bab5ecb191c9 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUser.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUser.golden
@@ -34,11 +34,15 @@ public class SyncDeleteUser {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      DeleteUserRequest request =
-          DeleteUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
-      identityClient.deleteUser(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    DeleteUserRequest request =
+        DeleteUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
+    identityClient.deleteUser(request);
   }
 }
 // [END goldensample_generated_Identity_DeleteUser_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUserString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUserString.golden
index 0471b8916752..8bcc6531d2f7 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUserString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUserString.golden
@@ -33,10 +33,14 @@ public class SyncDeleteUserString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      String name = UserName.of("[USER]").toString();
-      identityClient.deleteUser(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    String name = UserName.of("[USER]").toString();
+    identityClient.deleteUser(name);
   }
 }
 // [END goldensample_generated_Identity_DeleteUser_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUserUsername.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUserUsername.golden
index b0a0d20dd84c..4cbd561ce4a8 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUserUsername.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncDeleteUserUsername.golden
@@ -33,10 +33,14 @@ public class SyncDeleteUserUsername {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      UserName name = UserName.of("[USER]");
-      identityClient.deleteUser(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    UserName name = UserName.of("[USER]");
+    identityClient.deleteUser(name);
   }
 }
 // [END goldensample_generated_Identity_DeleteUser_Username_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUser.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUser.golden
index a32aed24a6ae..44b5ef33515e 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUser.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUser.golden
@@ -34,11 +34,15 @@ public class SyncGetUser {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      GetUserRequest request =
-          GetUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
-      User response = identityClient.getUser(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    GetUserRequest request =
+        GetUserRequest.newBuilder().setName(UserName.of("[USER]").toString()).build();
+    User response = identityClient.getUser(request);
   }
 }
 // [END goldensample_generated_Identity_GetUser_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUserString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUserString.golden
index b54b28c5e195..b1e873d2a1a1 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUserString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUserString.golden
@@ -33,10 +33,14 @@ public class SyncGetUserString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      String name = UserName.of("[USER]").toString();
-      User response = identityClient.getUser(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    String name = UserName.of("[USER]").toString();
+    User response = identityClient.getUser(name);
   }
 }
 // [END goldensample_generated_Identity_GetUser_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUserUsername.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUserUsername.golden
index ef19a6ad18d1..5810129bee60 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUserUsername.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncGetUserUsername.golden
@@ -33,10 +33,14 @@ public class SyncGetUserUsername {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      UserName name = UserName.of("[USER]");
-      User response = identityClient.getUser(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    UserName name = UserName.of("[USER]");
+    User response = identityClient.getUser(name);
   }
 }
 // [END goldensample_generated_Identity_GetUser_Username_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncListUsers.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncListUsers.golden
index b5f3a0151127..18319de0f97b 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncListUsers.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncListUsers.golden
@@ -33,15 +33,19 @@ public class SyncListUsers {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      ListUsersRequest request =
-          ListUsersRequest.newBuilder()
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      for (User element : identityClient.listUsers(request).iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    ListUsersRequest request =
+        ListUsersRequest.newBuilder()
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    for (User element : identityClient.listUsers(request).iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncUpdateUser.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncUpdateUser.golden
index 05f88e969ac5..0529e1a7280a 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncUpdateUser.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/identityclient/SyncUpdateUser.golden
@@ -33,11 +33,15 @@ public class SyncUpdateUser {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (IdentityClient identityClient = IdentityClient.create()) {
-      UpdateUserRequest request =
-          UpdateUserRequest.newBuilder().setUser(User.newBuilder().build()).build();
-      User response = identityClient.updateUser(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    IdentityClient identityClient = IdentityClient.create();
+    UpdateUserRequest request =
+        UpdateUserRequest.newBuilder().setUser(User.newBuilder().build()).build();
+    User response = identityClient.updateUser(request);
   }
 }
 // [END goldensample_generated_Identity_UpdateUser_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncConnect.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncConnect.golden
index 318986b0d1ed..78bcfc7d8265 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncConnect.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncConnect.golden
@@ -34,14 +34,18 @@ public class AsyncConnect {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      BidiStream<ConnectRequest, StreamBlurbsResponse> bidiStream =
-          messagingClient.connectCallable().call();
-      ConnectRequest request = ConnectRequest.newBuilder().build();
-      bidiStream.send(request);
-      for (StreamBlurbsResponse response : bidiStream) {
-        // Do something when a response is received.
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    BidiStream<ConnectRequest, StreamBlurbsResponse> bidiStream =
+        messagingClient.connectCallable().call();
+    ConnectRequest request = ConnectRequest.newBuilder().build();
+    bidiStream.send(request);
+    for (StreamBlurbsResponse response : bidiStream) {
+      // Do something when a response is received.
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncCreateBlurb.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncCreateBlurb.golden
index e58bd8373750..c8c6f07c1049 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncCreateBlurb.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncCreateBlurb.golden
@@ -35,16 +35,20 @@ public class AsyncCreateBlurb {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      CreateBlurbRequest request =
-          CreateBlurbRequest.newBuilder()
-              .setParent(ProfileName.of("[USER]").toString())
-              .setBlurb(Blurb.newBuilder().build())
-              .build();
-      ApiFuture<Blurb> future = messagingClient.createBlurbCallable().futureCall(request);
-      // Do something.
-      Blurb response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    CreateBlurbRequest request =
+        CreateBlurbRequest.newBuilder()
+            .setParent(ProfileName.of("[USER]").toString())
+            .setBlurb(Blurb.newBuilder().build())
+            .build();
+    ApiFuture<Blurb> future = messagingClient.createBlurbCallable().futureCall(request);
+    // Do something.
+    Blurb response = future.get();
   }
 }
 // [END goldensample_generated_Messaging_CreateBlurb_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncCreateRoom.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncCreateRoom.golden
index ff22fccac9ca..4d9af7197e43 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncCreateRoom.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncCreateRoom.golden
@@ -34,13 +34,17 @@ public class AsyncCreateRoom {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      CreateRoomRequest request =
-          CreateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
-      ApiFuture<Room> future = messagingClient.createRoomCallable().futureCall(request);
-      // Do something.
-      Room response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    CreateRoomRequest request =
+        CreateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
+    ApiFuture<Room> future = messagingClient.createRoomCallable().futureCall(request);
+    // Do something.
+    Room response = future.get();
   }
 }
 // [END goldensample_generated_Messaging_CreateRoom_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncDeleteBlurb.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncDeleteBlurb.golden
index af1812a55b09..b53b7ece2750 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncDeleteBlurb.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncDeleteBlurb.golden
@@ -35,15 +35,19 @@ public class AsyncDeleteBlurb {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      DeleteBlurbRequest request =
-          DeleteBlurbRequest.newBuilder()
-              .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
-              .build();
-      ApiFuture<Empty> future = messagingClient.deleteBlurbCallable().futureCall(request);
-      // Do something.
-      future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    DeleteBlurbRequest request =
+        DeleteBlurbRequest.newBuilder()
+            .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
+            .build();
+    ApiFuture<Empty> future = messagingClient.deleteBlurbCallable().futureCall(request);
+    // Do something.
+    future.get();
   }
 }
 // [END goldensample_generated_Messaging_DeleteBlurb_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncDeleteRoom.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncDeleteRoom.golden
index 8c0aba4c5504..f00144afd642 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncDeleteRoom.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncDeleteRoom.golden
@@ -35,13 +35,17 @@ public class AsyncDeleteRoom {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      DeleteRoomRequest request =
-          DeleteRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
-      ApiFuture<Empty> future = messagingClient.deleteRoomCallable().futureCall(request);
-      // Do something.
-      future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    DeleteRoomRequest request =
+        DeleteRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
+    ApiFuture<Empty> future = messagingClient.deleteRoomCallable().futureCall(request);
+    // Do something.
+    future.get();
   }
 }
 // [END goldensample_generated_Messaging_DeleteRoom_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncGetBlurb.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncGetBlurb.golden
index ed3e142a4010..343e06ef3e9c 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncGetBlurb.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncGetBlurb.golden
@@ -35,15 +35,19 @@ public class AsyncGetBlurb {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      GetBlurbRequest request =
-          GetBlurbRequest.newBuilder()
-              .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
-              .build();
-      ApiFuture<Blurb> future = messagingClient.getBlurbCallable().futureCall(request);
-      // Do something.
-      Blurb response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    GetBlurbRequest request =
+        GetBlurbRequest.newBuilder()
+            .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
+            .build();
+    ApiFuture<Blurb> future = messagingClient.getBlurbCallable().futureCall(request);
+    // Do something.
+    Blurb response = future.get();
   }
 }
 // [END goldensample_generated_Messaging_GetBlurb_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncGetRoom.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncGetRoom.golden
index 476dfc81b15b..536351399cd2 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncGetRoom.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncGetRoom.golden
@@ -35,13 +35,17 @@ public class AsyncGetRoom {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      GetRoomRequest request =
-          GetRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
-      ApiFuture<Room> future = messagingClient.getRoomCallable().futureCall(request);
-      // Do something.
-      Room response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    GetRoomRequest request =
+        GetRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
+    ApiFuture<Room> future = messagingClient.getRoomCallable().futureCall(request);
+    // Do something.
+    Room response = future.get();
   }
 }
 // [END goldensample_generated_Messaging_GetRoom_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListBlurbs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListBlurbs.golden
index 077ecdd0f396..8e8f6fc6326b 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListBlurbs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListBlurbs.golden
@@ -35,18 +35,22 @@ public class AsyncListBlurbs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ListBlurbsRequest request =
-          ListBlurbsRequest.newBuilder()
-              .setParent(ProfileName.of("[USER]").toString())
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<Blurb> future = messagingClient.listBlurbsPagedCallable().futureCall(request);
-      // Do something.
-      for (Blurb element : future.get().iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ListBlurbsRequest request =
+        ListBlurbsRequest.newBuilder()
+            .setParent(ProfileName.of("[USER]").toString())
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    ApiFuture<Blurb> future = messagingClient.listBlurbsPagedCallable().futureCall(request);
+    // Do something.
+    for (Blurb element : future.get().iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListBlurbsPaged.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListBlurbsPaged.golden
index 20ebe70435f3..0741fb0e1d69 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListBlurbsPaged.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListBlurbsPaged.golden
@@ -36,24 +36,28 @@ public class AsyncListBlurbsPaged {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ListBlurbsRequest request =
-          ListBlurbsRequest.newBuilder()
-              .setParent(ProfileName.of("[USER]").toString())
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      while (true) {
-        ListBlurbsResponse response = messagingClient.listBlurbsCallable().call(request);
-        for (Blurb element : response.getBlurbsList()) {
-          // doThingsWith(element);
-        }
-        String nextPageToken = response.getNextPageToken();
-        if (!Strings.isNullOrEmpty(nextPageToken)) {
-          request = request.toBuilder().setPageToken(nextPageToken).build();
-        } else {
-          break;
-        }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ListBlurbsRequest request =
+        ListBlurbsRequest.newBuilder()
+            .setParent(ProfileName.of("[USER]").toString())
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    while (true) {
+      ListBlurbsResponse response = messagingClient.listBlurbsCallable().call(request);
+      for (Blurb element : response.getBlurbsList()) {
+        // doThingsWith(element);
+      }
+      String nextPageToken = response.getNextPageToken();
+      if (!Strings.isNullOrEmpty(nextPageToken)) {
+        request = request.toBuilder().setPageToken(nextPageToken).build();
+      } else {
+        break;
       }
     }
   }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListRooms.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListRooms.golden
index ee18467a1099..4a6b7a1d8c7b 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListRooms.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListRooms.golden
@@ -34,17 +34,21 @@ public class AsyncListRooms {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ListRoomsRequest request =
-          ListRoomsRequest.newBuilder()
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<Room> future = messagingClient.listRoomsPagedCallable().futureCall(request);
-      // Do something.
-      for (Room element : future.get().iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ListRoomsRequest request =
+        ListRoomsRequest.newBuilder()
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    ApiFuture<Room> future = messagingClient.listRoomsPagedCallable().futureCall(request);
+    // Do something.
+    for (Room element : future.get().iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListRoomsPaged.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListRoomsPaged.golden
index a9dbe6241097..fe76441a4362 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListRoomsPaged.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncListRoomsPaged.golden
@@ -35,23 +35,27 @@ public class AsyncListRoomsPaged {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ListRoomsRequest request =
-          ListRoomsRequest.newBuilder()
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      while (true) {
-        ListRoomsResponse response = messagingClient.listRoomsCallable().call(request);
-        for (Room element : response.getRoomsList()) {
-          // doThingsWith(element);
-        }
-        String nextPageToken = response.getNextPageToken();
-        if (!Strings.isNullOrEmpty(nextPageToken)) {
-          request = request.toBuilder().setPageToken(nextPageToken).build();
-        } else {
-          break;
-        }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ListRoomsRequest request =
+        ListRoomsRequest.newBuilder()
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    while (true) {
+      ListRoomsResponse response = messagingClient.listRoomsCallable().call(request);
+      for (Room element : response.getRoomsList()) {
+        // doThingsWith(element);
+      }
+      String nextPageToken = response.getNextPageToken();
+      if (!Strings.isNullOrEmpty(nextPageToken)) {
+        request = request.toBuilder().setPageToken(nextPageToken).build();
+      } else {
+        break;
       }
     }
   }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSearchBlurbs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSearchBlurbs.golden
index 0331967ba444..5dcb5a09f669 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSearchBlurbs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSearchBlurbs.golden
@@ -35,18 +35,22 @@ public class AsyncSearchBlurbs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      SearchBlurbsRequest request =
-          SearchBlurbsRequest.newBuilder()
-              .setQuery("query107944136")
-              .setParent(ProfileName.of("[USER]").toString())
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      ApiFuture<Operation> future = messagingClient.searchBlurbsCallable().futureCall(request);
-      // Do something.
-      Operation response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    SearchBlurbsRequest request =
+        SearchBlurbsRequest.newBuilder()
+            .setQuery("query107944136")
+            .setParent(ProfileName.of("[USER]").toString())
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    ApiFuture<Operation> future = messagingClient.searchBlurbsCallable().futureCall(request);
+    // Do something.
+    Operation response = future.get();
   }
 }
 // [END goldensample_generated_Messaging_SearchBlurbs_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSearchBlurbsLRO.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSearchBlurbsLRO.golden
index b58df5ec148f..97f05a125706 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSearchBlurbsLRO.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSearchBlurbsLRO.golden
@@ -36,19 +36,23 @@ public class AsyncSearchBlurbsLRO {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      SearchBlurbsRequest request =
-          SearchBlurbsRequest.newBuilder()
-              .setQuery("query107944136")
-              .setParent(ProfileName.of("[USER]").toString())
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      OperationFuture<SearchBlurbsResponse, SearchBlurbsMetadata> future =
-          messagingClient.searchBlurbsOperationCallable().futureCall(request);
-      // Do something.
-      SearchBlurbsResponse response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    SearchBlurbsRequest request =
+        SearchBlurbsRequest.newBuilder()
+            .setQuery("query107944136")
+            .setParent(ProfileName.of("[USER]").toString())
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    OperationFuture<SearchBlurbsResponse, SearchBlurbsMetadata> future =
+        messagingClient.searchBlurbsOperationCallable().futureCall(request);
+    // Do something.
+    SearchBlurbsResponse response = future.get();
   }
 }
 // [END goldensample_generated_Messaging_SearchBlurbs_LRO_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSendBlurbs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSendBlurbs.golden
index 87960ea720e7..a0da690abe16 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSendBlurbs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncSendBlurbs.golden
@@ -36,33 +36,37 @@ public class AsyncSendBlurbs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ApiStreamObserver<CreateBlurbRequest> responseObserver =
-          new ApiStreamObserver<CreateBlurbRequest>() {
-            @Override
-            public void onNext(SendBlurbsResponse response) {
-              // Do something when a response is received.
-            }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ApiStreamObserver<CreateBlurbRequest> responseObserver =
+        new ApiStreamObserver<CreateBlurbRequest>() {
+          @Override
+          public void onNext(SendBlurbsResponse response) {
+            // Do something when a response is received.
+          }
 
-            @Override
-            public void onError(Throwable t) {
-              // Add error-handling
-            }
+          @Override
+          public void onError(Throwable t) {
+            // Add error-handling
+          }
 
-            @Override
-            public void onCompleted() {
-              // Do something when complete.
-            }
-          };
-      ApiStreamObserver<CreateBlurbRequest> requestObserver =
-          messagingClient.sendBlurbs().clientStreamingCall(responseObserver);
-      CreateBlurbRequest request =
-          CreateBlurbRequest.newBuilder()
-              .setParent(ProfileName.of("[USER]").toString())
-              .setBlurb(Blurb.newBuilder().build())
-              .build();
-      requestObserver.onNext(request);
-    }
+          @Override
+          public void onCompleted() {
+            // Do something when complete.
+          }
+        };
+    ApiStreamObserver<CreateBlurbRequest> requestObserver =
+        messagingClient.sendBlurbs().clientStreamingCall(responseObserver);
+    CreateBlurbRequest request =
+        CreateBlurbRequest.newBuilder()
+            .setParent(ProfileName.of("[USER]").toString())
+            .setBlurb(Blurb.newBuilder().build())
+            .build();
+    requestObserver.onNext(request);
   }
 }
 // [END goldensample_generated_Messaging_SendBlurbs_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncStreamBlurbs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncStreamBlurbs.golden
index 6d4a1397aa56..bca98cec8cc8 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncStreamBlurbs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncStreamBlurbs.golden
@@ -35,14 +35,18 @@ public class AsyncStreamBlurbs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      StreamBlurbsRequest request =
-          StreamBlurbsRequest.newBuilder().setName(ProfileName.of("[USER]").toString()).build();
-      ServerStream<StreamBlurbsResponse> stream =
-          messagingClient.streamBlurbsCallable().call(request);
-      for (StreamBlurbsResponse response : stream) {
-        // Do something when a response is received.
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    StreamBlurbsRequest request =
+        StreamBlurbsRequest.newBuilder().setName(ProfileName.of("[USER]").toString()).build();
+    ServerStream<StreamBlurbsResponse> stream =
+        messagingClient.streamBlurbsCallable().call(request);
+    for (StreamBlurbsResponse response : stream) {
+      // Do something when a response is received.
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncUpdateBlurb.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncUpdateBlurb.golden
index e3fafc66ea28..96325d2194e4 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncUpdateBlurb.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncUpdateBlurb.golden
@@ -34,13 +34,17 @@ public class AsyncUpdateBlurb {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      UpdateBlurbRequest request =
-          UpdateBlurbRequest.newBuilder().setBlurb(Blurb.newBuilder().build()).build();
-      ApiFuture<Blurb> future = messagingClient.updateBlurbCallable().futureCall(request);
-      // Do something.
-      Blurb response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    UpdateBlurbRequest request =
+        UpdateBlurbRequest.newBuilder().setBlurb(Blurb.newBuilder().build()).build();
+    ApiFuture<Blurb> future = messagingClient.updateBlurbCallable().futureCall(request);
+    // Do something.
+    Blurb response = future.get();
   }
 }
 // [END goldensample_generated_Messaging_UpdateBlurb_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncUpdateRoom.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncUpdateRoom.golden
index 539dbd8d67ae..6e8526a23ada 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncUpdateRoom.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/AsyncUpdateRoom.golden
@@ -34,13 +34,17 @@ public class AsyncUpdateRoom {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      UpdateRoomRequest request =
-          UpdateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
-      ApiFuture<Room> future = messagingClient.updateRoomCallable().futureCall(request);
-      // Do something.
-      Room response = future.get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    UpdateRoomRequest request =
+        UpdateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
+    ApiFuture<Room> future = messagingClient.updateRoomCallable().futureCall(request);
+    // Do something.
+    Room response = future.get();
   }
 }
 // [END goldensample_generated_Messaging_UpdateRoom_async]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurb.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurb.golden
index d2b5c1a05b4c..755bc91d0d2f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurb.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurb.golden
@@ -34,14 +34,18 @@ public class SyncCreateBlurb {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      CreateBlurbRequest request =
-          CreateBlurbRequest.newBuilder()
-              .setParent(ProfileName.of("[USER]").toString())
-              .setBlurb(Blurb.newBuilder().build())
-              .build();
-      Blurb response = messagingClient.createBlurb(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    CreateBlurbRequest request =
+        CreateBlurbRequest.newBuilder()
+            .setParent(ProfileName.of("[USER]").toString())
+            .setBlurb(Blurb.newBuilder().build())
+            .build();
+    Blurb response = messagingClient.createBlurb(request);
   }
 }
 // [END goldensample_generated_Messaging_CreateBlurb_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbProfilenameBytestring.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbProfilenameBytestring.golden
index 33f6c4a10cdc..26e3058438b7 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbProfilenameBytestring.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbProfilenameBytestring.golden
@@ -34,11 +34,15 @@ public class SyncCreateBlurbProfilenameBytestring {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ProfileName parent = ProfileName.of("[USER]");
-      ByteString image = ByteString.EMPTY;
-      Blurb response = messagingClient.createBlurb(parent, image);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ProfileName parent = ProfileName.of("[USER]");
+    ByteString image = ByteString.EMPTY;
+    Blurb response = messagingClient.createBlurb(parent, image);
   }
 }
 // [END goldensample_generated_Messaging_CreateBlurb_ProfilenameBytestring_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbProfilenameString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbProfilenameString.golden
index 8e60d8e479ba..641eb295cb4b 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbProfilenameString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbProfilenameString.golden
@@ -33,11 +33,15 @@ public class SyncCreateBlurbProfilenameString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ProfileName parent = ProfileName.of("[USER]");
-      String text = "text3556653";
-      Blurb response = messagingClient.createBlurb(parent, text);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ProfileName parent = ProfileName.of("[USER]");
+    String text = "text3556653";
+    Blurb response = messagingClient.createBlurb(parent, text);
   }
 }
 // [END goldensample_generated_Messaging_CreateBlurb_ProfilenameString_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbRoomnameBytestring.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbRoomnameBytestring.golden
index 761e4c46c3a1..e0fc0f0b33b3 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbRoomnameBytestring.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbRoomnameBytestring.golden
@@ -34,11 +34,15 @@ public class SyncCreateBlurbRoomnameBytestring {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      RoomName parent = RoomName.of("[ROOM]");
-      ByteString image = ByteString.EMPTY;
-      Blurb response = messagingClient.createBlurb(parent, image);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    RoomName parent = RoomName.of("[ROOM]");
+    ByteString image = ByteString.EMPTY;
+    Blurb response = messagingClient.createBlurb(parent, image);
   }
 }
 // [END goldensample_generated_Messaging_CreateBlurb_RoomnameBytestring_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbRoomnameString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbRoomnameString.golden
index ee819230f64f..e492feb5ae34 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbRoomnameString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbRoomnameString.golden
@@ -33,11 +33,15 @@ public class SyncCreateBlurbRoomnameString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      RoomName parent = RoomName.of("[ROOM]");
-      String text = "text3556653";
-      Blurb response = messagingClient.createBlurb(parent, text);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    RoomName parent = RoomName.of("[ROOM]");
+    String text = "text3556653";
+    Blurb response = messagingClient.createBlurb(parent, text);
   }
 }
 // [END goldensample_generated_Messaging_CreateBlurb_RoomnameString_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbStringBytestring.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbStringBytestring.golden
index 5e5ebad693bb..71cd712f0a29 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbStringBytestring.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbStringBytestring.golden
@@ -34,11 +34,15 @@ public class SyncCreateBlurbStringBytestring {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String parent = ProfileName.of("[USER]").toString();
-      ByteString image = ByteString.EMPTY;
-      Blurb response = messagingClient.createBlurb(parent, image);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String parent = ProfileName.of("[USER]").toString();
+    ByteString image = ByteString.EMPTY;
+    Blurb response = messagingClient.createBlurb(parent, image);
   }
 }
 // [END goldensample_generated_Messaging_CreateBlurb_StringBytestring_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbStringString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbStringString.golden
index 5fc08872f32b..93de7da43dd0 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbStringString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateBlurbStringString.golden
@@ -33,11 +33,15 @@ public class SyncCreateBlurbStringString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String parent = ProfileName.of("[USER]").toString();
-      String text = "text3556653";
-      Blurb response = messagingClient.createBlurb(parent, text);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String parent = ProfileName.of("[USER]").toString();
+    String text = "text3556653";
+    Blurb response = messagingClient.createBlurb(parent, text);
   }
 }
 // [END goldensample_generated_Messaging_CreateBlurb_StringString_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateRoom.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateRoom.golden
index 7842ebea2425..1e46194ae3be 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateRoom.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateRoom.golden
@@ -33,11 +33,15 @@ public class SyncCreateRoom {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      CreateRoomRequest request =
-          CreateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
-      Room response = messagingClient.createRoom(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    CreateRoomRequest request =
+        CreateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
+    Room response = messagingClient.createRoom(request);
   }
 }
 // [END goldensample_generated_Messaging_CreateRoom_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateRoomStringString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateRoomStringString.golden
index f96d76acf4c5..be15697f0f69 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateRoomStringString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateRoomStringString.golden
@@ -32,11 +32,15 @@ public class SyncCreateRoomStringString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String displayName = "displayName1714148973";
-      String description = "description-1724546052";
-      Room response = messagingClient.createRoom(displayName, description);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String displayName = "displayName1714148973";
+    String description = "description-1724546052";
+    Room response = messagingClient.createRoom(displayName, description);
   }
 }
 // [END goldensample_generated_Messaging_CreateRoom_StringString_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateSetCredentialsProvider.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateSetCredentialsProvider.golden
index f2377f6dd53f..2f5da984f626 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateSetCredentialsProvider.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateSetCredentialsProvider.golden
@@ -34,6 +34,11 @@ public class SyncCreateSetCredentialsProvider {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     MessagingSettings messagingSettings =
         MessagingSettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateSetEndpoint.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateSetEndpoint.golden
index a0ebebc4da92..076ec4b218e7 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateSetEndpoint.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncCreateSetEndpoint.golden
@@ -33,6 +33,11 @@ public class SyncCreateSetEndpoint {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     MessagingSettings messagingSettings =
         MessagingSettings.newBuilder().setEndpoint(myEndpoint).build();
     MessagingClient messagingClient = MessagingClient.create(messagingSettings);
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurb.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurb.golden
index cdb73087b159..ddcdd573d69e 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurb.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurb.golden
@@ -34,13 +34,17 @@ public class SyncDeleteBlurb {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      DeleteBlurbRequest request =
-          DeleteBlurbRequest.newBuilder()
-              .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
-              .build();
-      messagingClient.deleteBlurb(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    DeleteBlurbRequest request =
+        DeleteBlurbRequest.newBuilder()
+            .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
+            .build();
+    messagingClient.deleteBlurb(request);
   }
 }
 // [END goldensample_generated_Messaging_DeleteBlurb_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurbBlurbname.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurbBlurbname.golden
index 21d3be2509a9..874d319f540f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurbBlurbname.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurbBlurbname.golden
@@ -33,10 +33,14 @@ public class SyncDeleteBlurbBlurbname {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      BlurbName name = BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]");
-      messagingClient.deleteBlurb(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    BlurbName name = BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]");
+    messagingClient.deleteBlurb(name);
   }
 }
 // [END goldensample_generated_Messaging_DeleteBlurb_Blurbname_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurbString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurbString.golden
index 864f6bf16bc8..80ec168c0f0f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurbString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteBlurbString.golden
@@ -33,11 +33,15 @@ public class SyncDeleteBlurbString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String name =
-          BlurbName.ofUserLegacyUserBlurbName("[USER]", "[LEGACY_USER]", "[BLURB]").toString();
-      messagingClient.deleteBlurb(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String name =
+        BlurbName.ofUserLegacyUserBlurbName("[USER]", "[LEGACY_USER]", "[BLURB]").toString();
+    messagingClient.deleteBlurb(name);
   }
 }
 // [END goldensample_generated_Messaging_DeleteBlurb_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoom.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoom.golden
index 128c9d6798da..9d57a1e0ee22 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoom.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoom.golden
@@ -34,11 +34,15 @@ public class SyncDeleteRoom {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      DeleteRoomRequest request =
-          DeleteRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
-      messagingClient.deleteRoom(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    DeleteRoomRequest request =
+        DeleteRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
+    messagingClient.deleteRoom(request);
   }
 }
 // [END goldensample_generated_Messaging_DeleteRoom_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoomRoomname.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoomRoomname.golden
index 4f3cde1c6b1c..562893370ff5 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoomRoomname.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoomRoomname.golden
@@ -33,10 +33,14 @@ public class SyncDeleteRoomRoomname {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      RoomName name = RoomName.of("[ROOM]");
-      messagingClient.deleteRoom(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    RoomName name = RoomName.of("[ROOM]");
+    messagingClient.deleteRoom(name);
   }
 }
 // [END goldensample_generated_Messaging_DeleteRoom_Roomname_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoomString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoomString.golden
index ec8a08416b64..b05950a9bf2a 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoomString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncDeleteRoomString.golden
@@ -33,10 +33,14 @@ public class SyncDeleteRoomString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String name = RoomName.of("[ROOM]").toString();
-      messagingClient.deleteRoom(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String name = RoomName.of("[ROOM]").toString();
+    messagingClient.deleteRoom(name);
   }
 }
 // [END goldensample_generated_Messaging_DeleteRoom_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurb.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurb.golden
index 631604f878e7..e2bd1c3e6235 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurb.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurb.golden
@@ -34,13 +34,17 @@ public class SyncGetBlurb {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      GetBlurbRequest request =
-          GetBlurbRequest.newBuilder()
-              .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
-              .build();
-      Blurb response = messagingClient.getBlurb(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    GetBlurbRequest request =
+        GetBlurbRequest.newBuilder()
+            .setName(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
+            .build();
+    Blurb response = messagingClient.getBlurb(request);
   }
 }
 // [END goldensample_generated_Messaging_GetBlurb_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurbBlurbname.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurbBlurbname.golden
index d538b7fab2dd..87e0f037b02b 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurbBlurbname.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurbBlurbname.golden
@@ -33,10 +33,14 @@ public class SyncGetBlurbBlurbname {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      BlurbName name = BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]");
-      Blurb response = messagingClient.getBlurb(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    BlurbName name = BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]");
+    Blurb response = messagingClient.getBlurb(name);
   }
 }
 // [END goldensample_generated_Messaging_GetBlurb_Blurbname_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurbString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurbString.golden
index 004da1b32be4..04e334fca793 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurbString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetBlurbString.golden
@@ -33,11 +33,15 @@ public class SyncGetBlurbString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String name =
-          BlurbName.ofUserLegacyUserBlurbName("[USER]", "[LEGACY_USER]", "[BLURB]").toString();
-      Blurb response = messagingClient.getBlurb(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String name =
+        BlurbName.ofUserLegacyUserBlurbName("[USER]", "[LEGACY_USER]", "[BLURB]").toString();
+    Blurb response = messagingClient.getBlurb(name);
   }
 }
 // [END goldensample_generated_Messaging_GetBlurb_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoom.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoom.golden
index 3c6df997a196..9b7c24321726 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoom.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoom.golden
@@ -34,11 +34,15 @@ public class SyncGetRoom {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      GetRoomRequest request =
-          GetRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
-      Room response = messagingClient.getRoom(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    GetRoomRequest request =
+        GetRoomRequest.newBuilder().setName(RoomName.of("[ROOM]").toString()).build();
+    Room response = messagingClient.getRoom(request);
   }
 }
 // [END goldensample_generated_Messaging_GetRoom_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoomRoomname.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoomRoomname.golden
index 62193bbaa85f..135f2eeecf40 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoomRoomname.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoomRoomname.golden
@@ -33,10 +33,14 @@ public class SyncGetRoomRoomname {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      RoomName name = RoomName.of("[ROOM]");
-      Room response = messagingClient.getRoom(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    RoomName name = RoomName.of("[ROOM]");
+    Room response = messagingClient.getRoom(name);
   }
 }
 // [END goldensample_generated_Messaging_GetRoom_Roomname_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoomString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoomString.golden
index 963edfe1e657..2a6bb2ceee64 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoomString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncGetRoomString.golden
@@ -33,10 +33,14 @@ public class SyncGetRoomString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String name = RoomName.of("[ROOM]").toString();
-      Room response = messagingClient.getRoom(name);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String name = RoomName.of("[ROOM]").toString();
+    Room response = messagingClient.getRoom(name);
   }
 }
 // [END goldensample_generated_Messaging_GetRoom_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbs.golden
index eec7f8f96494..d77c12390da4 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbs.golden
@@ -34,16 +34,20 @@ public class SyncListBlurbs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ListBlurbsRequest request =
-          ListBlurbsRequest.newBuilder()
-              .setParent(ProfileName.of("[USER]").toString())
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      for (Blurb element : messagingClient.listBlurbs(request).iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ListBlurbsRequest request =
+        ListBlurbsRequest.newBuilder()
+            .setParent(ProfileName.of("[USER]").toString())
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    for (Blurb element : messagingClient.listBlurbs(request).iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsProfilename.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsProfilename.golden
index 92bab5e6ac62..a56266f9a5e7 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsProfilename.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsProfilename.golden
@@ -33,11 +33,15 @@ public class SyncListBlurbsProfilename {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ProfileName parent = ProfileName.of("[USER]");
-      for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ProfileName parent = ProfileName.of("[USER]");
+    for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsRoomname.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsRoomname.golden
index dc7a69d58ec8..ca44bde778ee 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsRoomname.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsRoomname.golden
@@ -33,11 +33,15 @@ public class SyncListBlurbsRoomname {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      RoomName parent = RoomName.of("[ROOM]");
-      for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    RoomName parent = RoomName.of("[ROOM]");
+    for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsString.golden
index 3536a447ddd2..dfd7ea72711f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListBlurbsString.golden
@@ -33,11 +33,15 @@ public class SyncListBlurbsString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String parent = ProfileName.of("[USER]").toString();
-      for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String parent = ProfileName.of("[USER]").toString();
+    for (Blurb element : messagingClient.listBlurbs(parent).iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListRooms.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListRooms.golden
index 3e98751800e7..34d583cd5f93 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListRooms.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncListRooms.golden
@@ -33,15 +33,19 @@ public class SyncListRooms {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      ListRoomsRequest request =
-          ListRoomsRequest.newBuilder()
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      for (Room element : messagingClient.listRooms(request).iterateAll()) {
-        // doThingsWith(element);
-      }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    ListRoomsRequest request =
+        ListRoomsRequest.newBuilder()
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    for (Room element : messagingClient.listRooms(request).iterateAll()) {
+      // doThingsWith(element);
     }
   }
 }
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncSearchBlurbs.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncSearchBlurbs.golden
index f00ca3afeb07..776520d89908 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncSearchBlurbs.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncSearchBlurbs.golden
@@ -34,16 +34,20 @@ public class SyncSearchBlurbs {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      SearchBlurbsRequest request =
-          SearchBlurbsRequest.newBuilder()
-              .setQuery("query107944136")
-              .setParent(ProfileName.of("[USER]").toString())
-              .setPageSize(883849137)
-              .setPageToken("pageToken873572522")
-              .build();
-      SearchBlurbsResponse response = messagingClient.searchBlurbsAsync(request).get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    SearchBlurbsRequest request =
+        SearchBlurbsRequest.newBuilder()
+            .setQuery("query107944136")
+            .setParent(ProfileName.of("[USER]").toString())
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .build();
+    SearchBlurbsResponse response = messagingClient.searchBlurbsAsync(request).get();
   }
 }
 // [END goldensample_generated_Messaging_SearchBlurbs_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncSearchBlurbsString.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncSearchBlurbsString.golden
index a6c306195162..3cdd21b5218f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncSearchBlurbsString.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncSearchBlurbsString.golden
@@ -32,10 +32,14 @@ public class SyncSearchBlurbsString {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      String query = "query107944136";
-      SearchBlurbsResponse response = messagingClient.searchBlurbsAsync(query).get();
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    String query = "query107944136";
+    SearchBlurbsResponse response = messagingClient.searchBlurbsAsync(query).get();
   }
 }
 // [END goldensample_generated_Messaging_SearchBlurbs_String_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncUpdateBlurb.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncUpdateBlurb.golden
index 4c58aa77b285..583e47a44974 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncUpdateBlurb.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncUpdateBlurb.golden
@@ -33,11 +33,15 @@ public class SyncUpdateBlurb {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      UpdateBlurbRequest request =
-          UpdateBlurbRequest.newBuilder().setBlurb(Blurb.newBuilder().build()).build();
-      Blurb response = messagingClient.updateBlurb(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    UpdateBlurbRequest request =
+        UpdateBlurbRequest.newBuilder().setBlurb(Blurb.newBuilder().build()).build();
+    Blurb response = messagingClient.updateBlurb(request);
   }
 }
 // [END goldensample_generated_Messaging_UpdateBlurb_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncUpdateRoom.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncUpdateRoom.golden
index 5a8f111584da..31c70aff0486 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncUpdateRoom.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/messagingclient/SyncUpdateRoom.golden
@@ -33,11 +33,15 @@ public class SyncUpdateRoom {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-    try (MessagingClient messagingClient = MessagingClient.create()) {
-      UpdateRoomRequest request =
-          UpdateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
-      Room response = messagingClient.updateRoom(request);
-    }
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
+    MessagingClient messagingClient = MessagingClient.create();
+    UpdateRoomRequest request =
+        UpdateRoomRequest.newBuilder().setRoom(Room.newBuilder().build()).build();
+    Room response = messagingClient.updateRoom(request);
   }
 }
 // [END goldensample_generated_Messaging_UpdateRoom_sync]
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncEcho.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncEcho.golden
index 72bcf935aff2..75d689d18a21 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncEcho.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncEcho.golden
@@ -32,6 +32,11 @@ public class SyncEcho {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoSettings.Builder echoSettingsBuilder = EchoSettings.newBuilder();
     echoSettingsBuilder
         .echoSettings()
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncEchoShouldGenerateAsUsual.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncEchoShouldGenerateAsUsual.golden
index 64beddd0cd26..9c2ee168d9f7 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncEchoShouldGenerateAsUsual.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncEchoShouldGenerateAsUsual.golden
@@ -32,6 +32,11 @@ public class SyncEchoShouldGenerateAsUsual {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoServiceShouldGeneratePartialUsualSettings.Builder
         echoServiceShouldGeneratePartialUsualSettingsBuilder =
             EchoServiceShouldGeneratePartialUsualSettings.newBuilder();
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncFastFibonacci.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncFastFibonacci.golden
index 1ad7ea2c07f6..d27b1e92967b 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncFastFibonacci.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncFastFibonacci.golden
@@ -32,6 +32,11 @@ public class SyncFastFibonacci {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     DeprecatedServiceSettings.Builder deprecatedServiceSettingsBuilder =
         DeprecatedServiceSettings.newBuilder();
     deprecatedServiceSettingsBuilder
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncWait.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncWait.golden
index 56b28ef988a5..b5b18a0121ea 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncWait.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/SyncWait.golden
@@ -35,6 +35,11 @@ public class SyncWait {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoSettings.Builder echoSettingsBuilder = EchoSettings.newBuilder();
     TimedRetryAlgorithm timedRetryAlgorithm =
         OperationalTimedPollAlgorithm.create(
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncCreateTopic.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncCreateTopic.golden
index 1d4be7de4165..8c35d140aa02 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncCreateTopic.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncCreateTopic.golden
@@ -32,6 +32,11 @@ public class SyncCreateTopic {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     PublisherStubSettings.Builder publisherSettingsBuilder = PublisherStubSettings.newBuilder();
     publisherSettingsBuilder
         .createTopicSettings()
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncDeleteJob.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncDeleteJob.golden
index db01c32cd86d..c5c74d55d875 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncDeleteJob.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncDeleteJob.golden
@@ -32,6 +32,11 @@ public class SyncDeleteJob {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     JobServiceStubSettings.Builder jobServiceSettingsBuilder = JobServiceStubSettings.newBuilder();
     jobServiceSettingsBuilder
         .deleteJobSettings()
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncDeleteLog.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncDeleteLog.golden
index e52a0ed50153..cf834adbcb29 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncDeleteLog.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncDeleteLog.golden
@@ -32,6 +32,11 @@ public class SyncDeleteLog {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     LoggingServiceV2StubSettings.Builder loggingServiceV2SettingsBuilder =
         LoggingServiceV2StubSettings.newBuilder();
     loggingServiceV2SettingsBuilder
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEcho.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEcho.golden
index 6ddb9df6435e..227fa468a866 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEcho.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEcho.golden
@@ -32,6 +32,11 @@ public class SyncEcho {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoStubSettings.Builder echoSettingsBuilder = EchoStubSettings.newBuilder();
     echoSettingsBuilder
         .echoSettings()
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEchoShouldGenerateAsUsual.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEchoShouldGenerateAsUsual.golden
index 8daf4e32c6a8..ac0b176f2305 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEchoShouldGenerateAsUsual.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEchoShouldGenerateAsUsual.golden
@@ -32,6 +32,11 @@ public class SyncEchoShouldGenerateAsUsual {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoServiceShouldGeneratePartialUsualStubSettings.Builder
         echoServiceShouldGeneratePartialUsualSettingsBuilder =
             EchoServiceShouldGeneratePartialUsualStubSettings.newBuilder();
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEchoWithVersionMethod.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEchoWithVersionMethod.golden
index 30718ddfaea6..caca1e972df9 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEchoWithVersionMethod.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncEchoWithVersionMethod.golden
@@ -32,6 +32,11 @@ public class SyncEchoWithVersionMethod {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoWithVersionStubSettings.Builder echoWithVersionSettingsBuilder =
         EchoWithVersionStubSettings.newBuilder();
     echoWithVersionSettingsBuilder
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncFastFibonacci.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncFastFibonacci.golden
index 6dac79d370c7..c3e17f5be0fb 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncFastFibonacci.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncFastFibonacci.golden
@@ -32,6 +32,11 @@ public class SyncFastFibonacci {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     DeprecatedServiceStubSettings.Builder deprecatedServiceSettingsBuilder =
         DeprecatedServiceStubSettings.newBuilder();
     deprecatedServiceSettingsBuilder
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncWait.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncWait.golden
index 0d3abce70e09..fc17d933f89f 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncWait.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/samples/servicesettings/stub/SyncWait.golden
@@ -35,6 +35,11 @@ public class SyncWait {
     // - It may require correct/in-range values for request initialization.
     // - It may require specifying regional endpoints when creating the service client as shown in
     // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+    // - The samples create a client that can be re-used for multiple requests
+    // and are expected to be long-lived.
+    // The clients should be resource managed properly and eventually closed.
+    // For more information on client lifecycle, see
+    // https://docs.cloud.google.com/java/docs/client-lifecycle
     EchoStubSettings.Builder echoSettingsBuilder = EchoStubSettings.newBuilder();
     TimedRetryAlgorithm timedRetryAlgorithm =
         OperationalTimedPollAlgorithm.create(
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/EchoClient.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/EchoClient.golden
index 91e167d4e103..ecfca6239dd2 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/EchoClient.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/EchoClient.golden
@@ -41,9 +41,13 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (EchoClient echoClient = EchoClient.create()) {
- *   EchoResponse response = echoClient.echo();
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * EchoClient echoClient = EchoClient.create();
+ * EchoResponse response = echoClient.echo();
  * }</pre>
  *
  * <p>Note: close() needs to be called on the EchoClient object to clean up resources such as
@@ -248,6 +252,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * EchoSettings echoSettings =
  *     EchoSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -263,6 +272,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * EchoSettings echoSettings = EchoSettings.newBuilder().setEndpoint(myEndpoint).build();
  * EchoClient echoClient = EchoClient.create(echoSettings);
  * }</pre>
@@ -276,6 +290,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * EchoSettings echoSettings = EchoSettings.newHttpJsonBuilder().build();
  * EchoClient echoClient = EchoClient.create(echoSettings);
  * }</pre>
@@ -366,9 +385,13 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoResponse response = echoClient.echo();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoResponse response = echoClient.echo();
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -389,10 +412,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   ResourceName parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
-   *   EchoResponse response = echoClient.echo(parent);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * ResourceName parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
+   * EchoResponse response = echoClient.echo(parent);
    * }</pre>
    *
    * @param parent
@@ -414,10 +441,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   Status error = Status.newBuilder().build();
-   *   EchoResponse response = echoClient.echo(error);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * Status error = Status.newBuilder().build();
+   * EchoResponse response = echoClient.echo(error);
    * }</pre>
    *
    * @param error
@@ -438,10 +469,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   FoobarName name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
-   *   EchoResponse response = echoClient.echo(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * FoobarName name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]");
+   * EchoResponse response = echoClient.echo(name);
    * }</pre>
    *
    * @param name
@@ -463,10 +498,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   String content = "content951530617";
-   *   EchoResponse response = echoClient.echo(content);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * String content = "content951530617";
+   * EchoResponse response = echoClient.echo(content);
    * }</pre>
    *
    * @param content
@@ -487,10 +526,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   String name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
-   *   EchoResponse response = echoClient.echo(name);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * String name = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
+   * EchoResponse response = echoClient.echo(name);
    * }</pre>
    *
    * @param name
@@ -511,10 +554,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   String parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
-   *   EchoResponse response = echoClient.echo(parent);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * String parent = FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString();
+   * EchoResponse response = echoClient.echo(parent);
    * }</pre>
    *
    * @param parent
@@ -535,11 +582,15 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   String content = "content951530617";
-   *   Severity severity = Severity.forNumber(0);
-   *   EchoResponse response = echoClient.echo(content, severity);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * String content = "content951530617";
+   * Severity severity = Severity.forNumber(0);
+   * EchoResponse response = echoClient.echo(content, severity);
    * }</pre>
    *
    * @param content
@@ -562,16 +613,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   EchoResponse response = echoClient.echo(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * EchoResponse response = echoClient.echo(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -591,18 +646,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   ApiFuture<EchoResponse> future = echoClient.echoCallable().futureCall(request);
-   *   // Do something.
-   *   EchoResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * ApiFuture<EchoResponse> future = echoClient.echoCallable().futureCall(request);
+   * // Do something.
+   * EchoResponse response = future.get();
    * }</pre>
    */
   public final UnaryCallable<EchoRequest, EchoResponse> echoCallable() {
@@ -619,16 +678,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   ExpandRequest request =
-   *       ExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .addAllInfo(new ArrayList<String>())
-   *           .build();
-   *   ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);
-   *   for (EchoResponse response : stream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * ExpandRequest request =
+   *     ExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .addAllInfo(new ArrayList<String>())
+   *         .build();
+   * ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);
+   * for (EchoResponse response : stream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -646,16 +709,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (EchoResponse element : echoClient.pagedExpand(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * for (EchoResponse element : echoClient.pagedExpand(request).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -676,18 +743,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<EchoResponse> future = echoClient.pagedExpandPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (EchoResponse element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<EchoResponse> future = echoClient.pagedExpandPagedCallable().futureCall(request);
+   * // Do something.
+   * for (EchoResponse element : future.get().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    */
@@ -706,24 +777,28 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     PagedExpandResponse response = echoClient.pagedExpandCallable().call(request);
-   *     for (EchoResponse element : response.getResponsesList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * while (true) {
+   *   PagedExpandResponse response = echoClient.pagedExpandCallable().call(request);
+   *   for (EchoResponse element : response.getResponsesList()) {
+   *     // doThingsWith(element);
+   *   }
+   *   String nextPageToken = response.getNextPageToken();
+   *   if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *     request = request.toBuilder().setPageToken(nextPageToken).build();
+   *   } else {
+   *     break;
    *   }
    * }
    * }</pre>
@@ -742,10 +817,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   for (EchoResponse element : echoClient.simplePagedExpand().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * for (EchoResponse element : echoClient.simplePagedExpand().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -767,16 +846,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   for (EchoResponse element : echoClient.simplePagedExpand(request).iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * for (EchoResponse element : echoClient.simplePagedExpand(request).iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    *
@@ -797,19 +880,23 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   ApiFuture<EchoResponse> future =
-   *       echoClient.simplePagedExpandPagedCallable().futureCall(request);
-   *   // Do something.
-   *   for (EchoResponse element : future.get().iterateAll()) {
-   *     // doThingsWith(element);
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * ApiFuture<EchoResponse> future =
+   *     echoClient.simplePagedExpandPagedCallable().futureCall(request);
+   * // Do something.
+   * for (EchoResponse element : future.get().iterateAll()) {
+   *   // doThingsWith(element);
    * }
    * }</pre>
    */
@@ -828,24 +915,28 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   PagedExpandRequest request =
-   *       PagedExpandRequest.newBuilder()
-   *           .setContent("content951530617")
-   *           .setPageSize(883849137)
-   *           .setPageToken("pageToken873572522")
-   *           .build();
-   *   while (true) {
-   *     PagedExpandResponse response = echoClient.simplePagedExpandCallable().call(request);
-   *     for (EchoResponse element : response.getResponsesList()) {
-   *       // doThingsWith(element);
-   *     }
-   *     String nextPageToken = response.getNextPageToken();
-   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
-   *       request = request.toBuilder().setPageToken(nextPageToken).build();
-   *     } else {
-   *       break;
-   *     }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * PagedExpandRequest request =
+   *     PagedExpandRequest.newBuilder()
+   *         .setContent("content951530617")
+   *         .setPageSize(883849137)
+   *         .setPageToken("pageToken873572522")
+   *         .build();
+   * while (true) {
+   *   PagedExpandResponse response = echoClient.simplePagedExpandCallable().call(request);
+   *   for (EchoResponse element : response.getResponsesList()) {
+   *     // doThingsWith(element);
+   *   }
+   *   String nextPageToken = response.getNextPageToken();
+   *   if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *     request = request.toBuilder().setPageToken(nextPageToken).build();
+   *   } else {
+   *     break;
    *   }
    * }
    * }</pre>
@@ -864,10 +955,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   Duration ttl = Duration.newBuilder().build();
-   *   WaitResponse response = echoClient.waitAsync(ttl).get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * Duration ttl = Duration.newBuilder().build();
+   * WaitResponse response = echoClient.waitAsync(ttl).get();
    * }</pre>
    *
    * @param ttl
@@ -888,10 +983,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   Timestamp endTime = Timestamp.newBuilder().build();
-   *   WaitResponse response = echoClient.waitAsync(endTime).get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * Timestamp endTime = Timestamp.newBuilder().build();
+   * WaitResponse response = echoClient.waitAsync(endTime).get();
    * }</pre>
    *
    * @param endTime
@@ -912,10 +1011,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   WaitRequest request = WaitRequest.newBuilder().build();
-   *   WaitResponse response = echoClient.waitAsync(request).get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * WaitRequest request = WaitRequest.newBuilder().build();
+   * WaitResponse response = echoClient.waitAsync(request).get();
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -935,13 +1038,17 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   WaitRequest request = WaitRequest.newBuilder().build();
-   *   OperationFuture<WaitResponse, WaitMetadata> future =
-   *       echoClient.waitOperationCallable().futureCall(request);
-   *   // Do something.
-   *   WaitResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * WaitRequest request = WaitRequest.newBuilder().build();
+   * OperationFuture<WaitResponse, WaitMetadata> future =
+   *     echoClient.waitOperationCallable().futureCall(request);
+   * // Do something.
+   * WaitResponse response = future.get();
    * }</pre>
    */
   public final OperationCallable<WaitRequest, WaitResponse, WaitMetadata> waitOperationCallable() {
@@ -958,12 +1065,16 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   WaitRequest request = WaitRequest.newBuilder().build();
-   *   ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);
-   *   // Do something.
-   *   Operation response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * WaitRequest request = WaitRequest.newBuilder().build();
+   * ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);
+   * // Do something.
+   * Operation response = future.get();
    * }</pre>
    */
   public final UnaryCallable<WaitRequest, Operation> waitCallable() {
@@ -980,10 +1091,14 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   BlockRequest request = BlockRequest.newBuilder().build();
-   *   BlockResponse response = echoClient.block(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * BlockRequest request = BlockRequest.newBuilder().build();
+   * BlockResponse response = echoClient.block(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1003,12 +1118,16 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   BlockRequest request = BlockRequest.newBuilder().build();
-   *   ApiFuture<BlockResponse> future = echoClient.blockCallable().futureCall(request);
-   *   // Do something.
-   *   BlockResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * BlockRequest request = BlockRequest.newBuilder().build();
+   * ApiFuture<BlockResponse> future = echoClient.blockCallable().futureCall(request);
+   * // Do something.
+   * BlockResponse response = future.get();
    * }</pre>
    */
   public final UnaryCallable<BlockRequest, BlockResponse> blockCallable() {
@@ -1025,16 +1144,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   Object response = echoClient.collideName(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * Object response = echoClient.collideName(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1054,18 +1177,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   ApiFuture<Object> future = echoClient.collideNameCallable().futureCall(request);
-   *   // Do something.
-   *   Object response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * ApiFuture<Object> future = echoClient.collideNameCallable().futureCall(request);
+   * // Do something.
+   * Object response = future.get();
    * }</pre>
    */
   public final UnaryCallable<EchoRequest, Object> collideNameCallable() {
@@ -1082,16 +1209,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   Object response = echoClient.nestedBinding(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * Object response = echoClient.nestedBinding(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1111,18 +1242,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   ApiFuture<Object> future = echoClient.nestedBindingCallable().futureCall(request);
-   *   // Do something.
-   *   Object response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * ApiFuture<Object> future = echoClient.nestedBindingCallable().futureCall(request);
+   * // Do something.
+   * Object response = future.get();
    * }</pre>
    */
   public final UnaryCallable<EchoRequest, Object> nestedBindingCallable() {
@@ -1139,19 +1274,23 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatCallable().call();
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   bidiStream.send(request);
-   *   for (EchoResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * BidiStream<EchoRequest, EchoResponse> bidiStream = echoClient.chatCallable().call();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * bidiStream.send(request);
+   * for (EchoResponse response : bidiStream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -1169,16 +1308,20 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   EchoResponse response = echoClient.noBinding(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * EchoResponse response = echoClient.noBinding(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1198,18 +1341,22 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   EchoRequest request =
-   *       EchoRequest.newBuilder()
-   *           .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
-   *           .setSeverity(Severity.forNumber(0))
-   *           .setFooBar(Foobar.newBuilder().build())
-   *           .build();
-   *   ApiFuture<EchoResponse> future = echoClient.noBindingCallable().futureCall(request);
-   *   // Do something.
-   *   EchoResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * EchoRequest request =
+   *     EchoRequest.newBuilder()
+   *         .setName(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setParent(FoobarName.ofProjectFoobarName("[PROJECT]", "[FOOBAR]").toString())
+   *         .setSeverity(Severity.forNumber(0))
+   *         .setFooBar(Foobar.newBuilder().build())
+   *         .build();
+   * ApiFuture<EchoResponse> future = echoClient.noBindingCallable().futureCall(request);
+   * // Do something.
+   * EchoResponse response = future.get();
    * }</pre>
    */
   public final UnaryCallable<EchoRequest, EchoResponse> noBindingCallable() {
@@ -1226,11 +1373,15 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   Case case_ = Case.newBuilder().build();
-   *   FieldMask updateMask = FieldMask.newBuilder().build();
-   *   Case response = echoClient.updateCase(case_, updateMask);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * Case case_ = Case.newBuilder().build();
+   * FieldMask updateMask = FieldMask.newBuilder().build();
+   * Case response = echoClient.updateCase(case_, updateMask);
    * }</pre>
    *
    * @param case_
@@ -1253,11 +1404,15 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   UpdateCaseRequest request =
-   *       UpdateCaseRequest.newBuilder().setCase(Case.newBuilder().build()).build();
-   *   Case response = echoClient.updateCase(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * UpdateCaseRequest request =
+   *     UpdateCaseRequest.newBuilder().setCase(Case.newBuilder().build()).build();
+   * Case response = echoClient.updateCase(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -1277,13 +1432,17 @@ public class EchoClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (EchoClient echoClient = EchoClient.create()) {
-   *   UpdateCaseRequest request =
-   *       UpdateCaseRequest.newBuilder().setCase(Case.newBuilder().build()).build();
-   *   ApiFuture<Case> future = echoClient.updateCaseCallable().futureCall(request);
-   *   // Do something.
-   *   Case response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * EchoClient echoClient = EchoClient.create();
+   * UpdateCaseRequest request =
+   *     UpdateCaseRequest.newBuilder().setCase(Case.newBuilder().build()).build();
+   * ApiFuture<Case> future = echoClient.updateCaseCallable().futureCall(request);
+   * // Do something.
+   * Case response = future.get();
    * }</pre>
    */
   public final UnaryCallable<UpdateCaseRequest, Case> updateCaseCallable() {
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/WickedClient.golden b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/WickedClient.golden
index 138bee4bc15d..14847d34ed89 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/WickedClient.golden
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/WickedClient.golden
@@ -22,11 +22,15 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
- * try (WickedClient wickedClient = WickedClient.create()) {
- *   EvilRequest request =
- *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
- *   EvilResponse response = wickedClient.craftEvilPlan(request);
- * }
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
+ * WickedClient wickedClient = WickedClient.create();
+ * EvilRequest request =
+ *     EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+ * EvilResponse response = wickedClient.craftEvilPlan(request);
  * }</pre>
  *
  * <p>Note: close() needs to be called on the WickedClient object to clean up resources such as
@@ -92,6 +96,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * WickedSettings wickedSettings =
  *     WickedSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -107,6 +116,11 @@ import javax.annotation.Generated;
  * // - It may require correct/in-range values for request initialization.
  * // - It may require specifying regional endpoints when creating the service client as shown in
  * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * // - The samples create a client that can be re-used for multiple requests
+ * // and are expected to be long-lived.
+ * // The clients should be resource managed properly and eventually closed.
+ * // For more information on client lifecycle, see
+ * // https://docs.cloud.google.com/java/docs/client-lifecycle
  * WickedSettings wickedSettings = WickedSettings.newBuilder().setEndpoint(myEndpoint).build();
  * WickedClient wickedClient = WickedClient.create(wickedSettings);
  * }</pre>
@@ -172,11 +186,15 @@ public class WickedClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   EvilRequest request =
-   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-   *   EvilResponse response = wickedClient.craftEvilPlan(request);
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * WickedClient wickedClient = WickedClient.create();
+   * EvilRequest request =
+   *     EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+   * EvilResponse response = wickedClient.craftEvilPlan(request);
    * }</pre>
    *
    * @param request The request object containing all of the parameters for the API call.
@@ -196,13 +214,17 @@ public class WickedClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   EvilRequest request =
-   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-   *   ApiFuture<EvilResponse> future = wickedClient.craftEvilPlanCallable().futureCall(request);
-   *   // Do something.
-   *   EvilResponse response = future.get();
-   * }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * WickedClient wickedClient = WickedClient.create();
+   * EvilRequest request =
+   *     EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+   * ApiFuture<EvilResponse> future = wickedClient.craftEvilPlanCallable().futureCall(request);
+   * // Do something.
+   * EvilResponse response = future.get();
    * }</pre>
    */
   public final UnaryCallable<EvilRequest, EvilResponse> craftEvilPlanCallable() {
@@ -219,15 +241,19 @@ public class WickedClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   BidiStream<EvilRequest, EvilResponse> bidiStream =
-   *       wickedClient.brainstormEvilPlansCallable().call();
-   *   EvilRequest request =
-   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-   *   bidiStream.send(request);
-   *   for (EvilResponse response : bidiStream) {
-   *     // Do something when a response is received.
-   *   }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * WickedClient wickedClient = WickedClient.create();
+   * BidiStream<EvilRequest, EvilResponse> bidiStream =
+   *     wickedClient.brainstormEvilPlansCallable().call();
+   * EvilRequest request =
+   *     EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+   * bidiStream.send(request);
+   * for (EvilResponse response : bidiStream) {
+   *   // Do something when a response is received.
    * }
    * }</pre>
    */
@@ -245,30 +271,34 @@ public class WickedClient implements BackgroundResource {
    * // - It may require correct/in-range values for request initialization.
    * // - It may require specifying regional endpoints when creating the service client as shown in
    * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
-   * try (WickedClient wickedClient = WickedClient.create()) {
-   *   ApiStreamObserver<EvilRequest> responseObserver =
-   *       new ApiStreamObserver<EvilRequest>() {
-   *         {@literal @}Override
-   *         public void onNext(EvilResponse response) {
-   *           // Do something when a response is received.
-   *         }
+   * // - The samples create a client that can be re-used for multiple requests
+   * // and are expected to be long-lived.
+   * // The clients should be resource managed properly and eventually closed.
+   * // For more information on client lifecycle, see
+   * // https://docs.cloud.google.com/java/docs/client-lifecycle
+   * WickedClient wickedClient = WickedClient.create();
+   * ApiStreamObserver<EvilRequest> responseObserver =
+   *     new ApiStreamObserver<EvilRequest>() {
+   *       {@literal @}Override
+   *       public void onNext(EvilResponse response) {
+   *         // Do something when a response is received.
+   *       }
    *
-   *         {@literal @}Override
-   *         public void onError(Throwable t) {
-   *           // Add error-handling
-   *         }
+   *       {@literal @}Override
+   *       public void onError(Throwable t) {
+   *         // Add error-handling
+   *       }
    *
-   *         {@literal @}Override
-   *         public void onCompleted() {
-   *           // Do something when complete.
-   *         }
-   *       };
-   *   ApiStreamObserver<EvilRequest> requestObserver =
-   *       wickedClient.persuadeEvilPlan().clientStreamingCall(responseObserver);
-   *   EvilRequest request =
-   *       EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
-   *   requestObserver.onNext(request);
-   * }
+   *       {@literal @}Override
+   *       public void onCompleted() {
+   *         // Do something when complete.
+   *       }
+   *     };
+   * ApiStreamObserver<EvilRequest> requestObserver =
+   *     wickedClient.persuadeEvilPlan().clientStreamingCall(responseObserver);
+   * EvilRequest request =
+   *     EvilRequest.newBuilder().setMaliciousIdea("maliciousIdea712541645").build();
+   * requestObserver.onNext(request);
    * }</pre>
    */
   public final ClientStreamingCallable<EvilRequest, EvilResponse> persuadeEvilPlanCallable() {
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/SampleCodeWriterTest.java b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/SampleCodeWriterTest.java
index 820fa739a182..6e9938b4d567 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/SampleCodeWriterTest.java
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/SampleCodeWriterTest.java
@@ -112,6 +112,11 @@ void writeInlineSample() {
             "// - It may require correct/in-range values for request initialization.\n",
             "// - It may require specifying regional endpoints when creating the service client as shown in\n",
             "// https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library\n",
+            "// - The samples create a client that can be re-used for multiple requests\n",
+            "// and are expected to be long-lived.\n",
+            "// The clients should be resource managed properly and eventually closed.\n",
+            "// For more information on client lifecycle, see\n",
+            "// https://docs.cloud.google.com/java/docs/client-lifecycle\n",
             "ClientSettings clientSettings = ClientSettings.newBuilder().build();\n",
             "try (boolean aBool = false) {\n",
             "  int x = 3;\n",
@@ -147,6 +152,11 @@ void writeExecutableSample() {
             "    // - It may require correct/in-range values for request initialization.\n",
             "    // - It may require specifying regional endpoints when creating the service client as shown in\n",
             "    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library\n",
+            "    // - The samples create a client that can be re-used for multiple requests\n",
+            "    // and are expected to be long-lived.\n",
+            "    // The clients should be resource managed properly and eventually closed.\n",
+            "    // For more information on client lifecycle, see\n",
+            "    // https://docs.cloud.google.com/java/docs/client-lifecycle\n",
             "    ClientSettings clientSettings = ClientSettings.newBuilder().build();\n",
             "    try (boolean aBool = false) {\n",
             "      int x = 3;\n",
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/SampleComposerTest.java b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/SampleComposerTest.java
index 94e381dca856..e7b07beacfdb 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/SampleComposerTest.java
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/SampleComposerTest.java
@@ -54,6 +54,11 @@ void createInlineSample() {
             "// - It may require correct/in-range values for request initialization.\n",
             "// - It may require specifying regional endpoints when creating the service client as shown in\n",
             "// https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library\n",
+            "// - The samples create a client that can be re-used for multiple requests\n",
+            "// and are expected to be long-lived.\n",
+            "// The clients should be resource managed properly and eventually closed.\n",
+            "// For more information on client lifecycle, see\n",
+            "// https://docs.cloud.google.com/java/docs/client-lifecycle\n",
             "System.out.println(\"testing\");");
 
     assertEquals(expected, sampleResult);
@@ -88,6 +93,11 @@ void createExecutableSampleEmptyStatementSample() {
             "    // - It may require correct/in-range values for request initialization.\n",
             "    // - It may require specifying regional endpoints when creating the service client as shown in\n",
             "    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library\n",
+            "    // - The samples create a client that can be re-used for multiple requests\n",
+            "    // and are expected to be long-lived.\n",
+            "    // The clients should be resource managed properly and eventually closed.\n",
+            "    // For more information on client lifecycle, see\n",
+            "    // https://docs.cloud.google.com/java/docs/client-lifecycle\n",
             "  }\n",
             "}\n",
             "// [END apiname_generated_Echo_CreateExecutableSample_EmptyStatementSample_sync]\n");
@@ -127,6 +137,11 @@ void createExecutableSampleMethodArgsNoVar() {
             "    // - It may require correct/in-range values for request initialization.\n",
             "    // - It may require specifying regional endpoints when creating the service client as shown in\n",
             "    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library\n",
+            "    // - The samples create a client that can be re-used for multiple requests\n",
+            "    // and are expected to be long-lived.\n",
+            "    // The clients should be resource managed properly and eventually closed.\n",
+            "    // For more information on client lifecycle, see\n",
+            "    // https://docs.cloud.google.com/java/docs/client-lifecycle\n",
             "    System.out.println(\"Testing CreateExecutableSampleMethodArgsNoVar\");\n",
             "  }\n",
             "}\n",
@@ -176,6 +191,11 @@ void createExecutableSampleMethod() {
             "    // - It may require correct/in-range values for request initialization.\n",
             "    // - It may require specifying regional endpoints when creating the service client as shown in\n",
             "    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library\n",
+            "    // - The samples create a client that can be re-used for multiple requests\n",
+            "    // and are expected to be long-lived.\n",
+            "    // The clients should be resource managed properly and eventually closed.\n",
+            "    // For more information on client lifecycle, see\n",
+            "    // https://docs.cloud.google.com/java/docs/client-lifecycle\n",
             "    System.out.println(content);\n",
             "  }\n",
             "}\n",
@@ -265,6 +285,11 @@ void createExecutableSampleMethodMultipleStatements() {
             "    // - It may require correct/in-range values for request initialization.\n",
             "    // - It may require specifying regional endpoints when creating the service client as shown in\n",
             "    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library\n",
+            "    // - The samples create a client that can be re-used for multiple requests\n",
+            "    // and are expected to be long-lived.\n",
+            "    // The clients should be resource managed properly and eventually closed.\n",
+            "    // For more information on client lifecycle, see\n",
+            "    // https://docs.cloud.google.com/java/docs/client-lifecycle\n",
             "    System.out.println(content);\n",
             "    System.out.println(num);\n",
             "    System.out.println(thing.response());\n",
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientCallableMethodSampleComposerTest.java b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientCallableMethodSampleComposerTest.java
index 2b058aca7c64..cbd41542f8ad 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientCallableMethodSampleComposerTest.java
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientCallableMethodSampleComposerTest.java
@@ -111,13 +111,12 @@ void valid_composeLroCallableMethod_withReturnResponse() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  WaitRequest request = WaitRequest.newBuilder().build();\n",
-            "  OperationFuture<WaitResponse, WaitMetadata> future =\n",
-            "      echoClient.waitOperationCallable().futureCall(request);\n",
-            "  // Do something.\n",
-            "  WaitResponse response = future.get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "WaitRequest request = WaitRequest.newBuilder().build();\n",
+            "OperationFuture<WaitResponse, WaitMetadata> future =\n",
+            "    echoClient.waitOperationCallable().futureCall(request);\n",
+            "// Do something.\n",
+            "WaitResponse response = future.get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -179,13 +178,12 @@ void valid_composeLroCallableMethod_withReturnVoid() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  WaitRequest request = WaitRequest.newBuilder().build();\n",
-            "  OperationFuture<Empty, WaitMetadata> future =\n",
-            "      echoClient.waitOperationCallable().futureCall(request);\n",
-            "  // Do something.\n",
-            "  future.get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "WaitRequest request = WaitRequest.newBuilder().build();\n",
+            "OperationFuture<Empty, WaitMetadata> future =\n",
+            "    echoClient.waitOperationCallable().futureCall(request);\n",
+            "// Do something.\n",
+            "future.get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -237,19 +235,18 @@ void valid_composePagedCallableMethod() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  PagedExpandRequest request =\n",
-            "      PagedExpandRequest.newBuilder()\n",
-            "          .setContent(\"content951530617\")\n",
-            "          .setPageSize(883849137)\n",
-            "          .setPageToken(\"pageToken873572522\")\n",
-            "          .build();\n",
-            "  ApiFuture<EchoResponse> future ="
+            "EchoClient echoClient = EchoClient.create();\n",
+            "PagedExpandRequest request =\n",
+            "    PagedExpandRequest.newBuilder()\n",
+            "        .setContent(\"content951530617\")\n",
+            "        .setPageSize(883849137)\n",
+            "        .setPageToken(\"pageToken873572522\")\n",
+            "        .build();\n",
+            "ApiFuture<EchoResponse> future ="
                 + " echoClient.pagedExpandPagedCallable().futureCall(request);\n",
-            "  // Do something.\n",
-            "  for (EchoResponse element : future.get().iterateAll()) {\n",
-            "    // doThingsWith(element);\n",
-            "  }\n",
+            "// Do something.\n",
+            "for (EchoResponse element : future.get().iterateAll()) {\n",
+            "  // doThingsWith(element);\n",
             "}");
     Assert.assertEquals(results, expected);
   }
@@ -460,13 +457,12 @@ void valid_composeStreamCallableMethod_serverStream() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  ExpandRequest request =\n",
-            "      ExpandRequest.newBuilder().setContent(\"content951530617\").setInfo(\"info3237038\").build();\n",
-            "  ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);\n",
-            "  for (EchoResponse response : stream) {\n",
-            "    // Do something when a response is received.\n",
-            "  }\n",
+            "EchoClient echoClient = EchoClient.create();\n",
+            "ExpandRequest request =\n",
+            "    ExpandRequest.newBuilder().setContent(\"content951530617\").setInfo(\"info3237038\").build();\n",
+            "ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);\n",
+            "for (EchoResponse response : stream) {\n",
+            "  // Do something when a response is received.\n",
             "}");
     Assert.assertEquals(results, expected);
   }
@@ -566,22 +562,21 @@ void valid_composeStreamCallableMethod_bidiStream() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  BidiStream<EchoRequest, EchoResponse> bidiStream ="
+            "EchoClient echoClient = EchoClient.create();\n",
+            "BidiStream<EchoRequest, EchoResponse> bidiStream ="
                 + " echoClient.chatCallable().call();\n",
-            "  EchoRequest request =\n",
-            "      EchoRequest.newBuilder()\n",
-            "          .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "EchoRequest request =\n",
+            "    EchoRequest.newBuilder()\n",
+            "        .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "        .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setSeverity(Severity.forNumber(0))\n",
-            "          .setFoobar(Foobar.newBuilder().build())\n",
-            "          .build();\n",
-            "  bidiStream.send(request);\n",
-            "  for (EchoResponse response : bidiStream) {\n",
-            "    // Do something when a response is received.\n",
-            "  }\n",
+            "        .setSeverity(Severity.forNumber(0))\n",
+            "        .setFoobar(Foobar.newBuilder().build())\n",
+            "        .build();\n",
+            "bidiStream.send(request);\n",
+            "for (EchoResponse response : bidiStream) {\n",
+            "  // Do something when a response is received.\n",
             "}");
     Assert.assertEquals(results, expected);
   }
@@ -681,37 +676,36 @@ void valid_composeStreamCallableMethod_clientStream() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  ApiStreamObserver<EchoRequest> responseObserver =\n",
-            "      new ApiStreamObserver<EchoRequest>() {\n",
-            "        {@literal @}Override\n",
-            "        public void onNext(EchoResponse response) {\n",
-            "          // Do something when a response is received.\n",
-            "        }\n",
+            "EchoClient echoClient = EchoClient.create();\n",
+            "ApiStreamObserver<EchoRequest> responseObserver =\n",
+            "    new ApiStreamObserver<EchoRequest>() {\n",
+            "      {@literal @}Override\n",
+            "      public void onNext(EchoResponse response) {\n",
+            "        // Do something when a response is received.\n",
+            "      }\n",
             "\n",
-            "        {@literal @}Override\n",
-            "        public void onError(Throwable t) {\n",
-            "          // Add error-handling\n",
-            "        }\n",
+            "      {@literal @}Override\n",
+            "      public void onError(Throwable t) {\n",
+            "        // Add error-handling\n",
+            "      }\n",
             "\n",
-            "        {@literal @}Override\n",
-            "        public void onCompleted() {\n",
-            "          // Do something when complete.\n",
-            "        }\n",
-            "      };\n",
-            "  ApiStreamObserver<EchoRequest> requestObserver =\n",
-            "      echoClient.collect().clientStreamingCall(responseObserver);\n",
-            "  EchoRequest request =\n",
-            "      EchoRequest.newBuilder()\n",
-            "          .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "      {@literal @}Override\n",
+            "      public void onCompleted() {\n",
+            "        // Do something when complete.\n",
+            "      }\n",
+            "    };\n",
+            "ApiStreamObserver<EchoRequest> requestObserver =\n",
+            "    echoClient.collect().clientStreamingCall(responseObserver);\n",
+            "EchoRequest request =\n",
+            "    EchoRequest.newBuilder()\n",
+            "        .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "        .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setSeverity(Severity.forNumber(0))\n",
-            "          .setFoobar(Foobar.newBuilder().build())\n",
-            "          .build();\n",
-            "  requestObserver.onNext(request);\n",
-            "}");
+            "        .setSeverity(Severity.forNumber(0))\n",
+            "        .setFoobar(Foobar.newBuilder().build())\n",
+            "        .build();\n",
+            "requestObserver.onNext(request);");
     Assert.assertEquals(results, expected);
   }
 
@@ -806,20 +800,19 @@ void valid_composeRegularCallableMethod_unaryRpc() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  EchoRequest request =\n",
-            "      EchoRequest.newBuilder()\n",
-            "          .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "EchoClient echoClient = EchoClient.create();\n",
+            "EchoRequest request =\n",
+            "    EchoRequest.newBuilder()\n",
+            "        .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "        .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setSeverity(Severity.forNumber(0))\n",
-            "          .setFoobar(Foobar.newBuilder().build())\n",
-            "          .build();\n",
-            "  ApiFuture<EchoResponse> future = echoClient.echoCallable().futureCall(request);\n",
-            "  // Do something.\n",
-            "  EchoResponse response = future.get();\n",
-            "}");
+            "        .setSeverity(Severity.forNumber(0))\n",
+            "        .setFoobar(Foobar.newBuilder().build())\n",
+            "        .build();\n",
+            "ApiFuture<EchoResponse> future = echoClient.echoCallable().futureCall(request);\n",
+            "// Do something.\n",
+            "EchoResponse response = future.get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -884,12 +877,11 @@ void valid_composeRegularCallableMethod_lroRpc() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  WaitRequest request = WaitRequest.newBuilder().build();\n",
-            "  ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);\n",
-            "  // Do something.\n",
-            "  Operation response = future.get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "WaitRequest request = WaitRequest.newBuilder().build();\n",
+            "ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);\n",
+            "// Do something.\n",
+            "Operation response = future.get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -951,12 +943,11 @@ void valid_composeRegularCallableMethod_lroRpcWithReturnVoid() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  WaitRequest request = WaitRequest.newBuilder().build();\n",
-            "  ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);\n",
-            "  // Do something.\n",
-            "  future.get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "WaitRequest request = WaitRequest.newBuilder().build();\n",
+            "ApiFuture<Operation> future = echoClient.waitCallable().futureCall(request);\n",
+            "// Do something.\n",
+            "future.get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -1008,24 +999,23 @@ void valid_composeRegularCallableMethod_pageRpc() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  PagedExpandRequest request =\n",
-            "      PagedExpandRequest.newBuilder()\n",
-            "          .setContent(\"content951530617\")\n",
-            "          .setPageSize(883849137)\n",
-            "          .setPageToken(\"pageToken873572522\")\n",
-            "          .build();\n",
-            "  while (true) {\n",
-            "    PagedExpandResponse response = echoClient.pagedExpandCallable().call(request);\n",
-            "    for (EchoResponse element : response.getResponsesList()) {\n",
-            "      // doThingsWith(element);\n",
-            "    }\n",
-            "    String nextPageToken = response.getNextPageToken();\n",
-            "    if (!Strings.isNullOrEmpty(nextPageToken)) {\n",
-            "      request = request.toBuilder().setPageToken(nextPageToken).build();\n",
-            "    } else {\n",
-            "      break;\n",
-            "    }\n",
+            "EchoClient echoClient = EchoClient.create();\n",
+            "PagedExpandRequest request =\n",
+            "    PagedExpandRequest.newBuilder()\n",
+            "        .setContent(\"content951530617\")\n",
+            "        .setPageSize(883849137)\n",
+            "        .setPageToken(\"pageToken873572522\")\n",
+            "        .build();\n",
+            "while (true) {\n",
+            "  PagedExpandResponse response = echoClient.pagedExpandCallable().call(request);\n",
+            "  for (EchoResponse element : response.getResponsesList()) {\n",
+            "    // doThingsWith(element);\n",
+            "  }\n",
+            "  String nextPageToken = response.getNextPageToken();\n",
+            "  if (!Strings.isNullOrEmpty(nextPageToken)) {\n",
+            "    request = request.toBuilder().setPageToken(nextPageToken).build();\n",
+            "  } else {\n",
+            "    break;\n",
             "  }\n",
             "}");
     Assert.assertEquals(results, expected);
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientHeaderSampleComposerTest.java b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientHeaderSampleComposerTest.java
index 48a7e4175e14..1d929d748fcf 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientHeaderSampleComposerTest.java
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientHeaderSampleComposerTest.java
@@ -81,9 +81,8 @@ void composeClassHeaderSample_unaryRpc() {
     String results = writeStatements(sample);
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  EchoResponse response = echoClient.echo();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "EchoResponse response = echoClient.echo();");
     Assert.assertEquals(expected, results);
   }
 
@@ -164,10 +163,9 @@ void composeClassHeaderSample_firstMethodIsNotUnaryRpc() {
                 service, clientType, resourceNames, messageTypes));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  Duration ttl = Duration.newBuilder().build();\n",
-            "  WaitResponse response = echoClient.waitAsync(ttl).get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "Duration ttl = Duration.newBuilder().build();\n",
+            "WaitResponse response = echoClient.waitAsync(ttl).get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -219,18 +217,17 @@ void composeClassHeaderSample_firstMethodHasNoSignatures() {
     System.out.println("results:  " + results);
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  EchoRequest request =\n",
-            "      EchoRequest.newBuilder()\n",
-            "          .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "EchoClient echoClient = EchoClient.create();\n",
+            "EchoRequest request =\n",
+            "    EchoRequest.newBuilder()\n",
+            "        .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "        .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setSeverity(Severity.forNumber(0))\n",
-            "          .setFoobar(Foobar.newBuilder().build())\n",
-            "          .build();\n",
-            "  EchoResponse response = echoClient.echo(request);\n",
-            "}");
+            "        .setSeverity(Severity.forNumber(0))\n",
+            "        .setFoobar(Foobar.newBuilder().build())\n",
+            "        .build();\n",
+            "EchoResponse response = echoClient.echo(request);");
     System.out.println("results:  " + expected);
     Assert.assertEquals(results, expected);
   }
@@ -282,13 +279,12 @@ void composeClassHeaderSample_firstMethodIsStream() {
                 service, clientType, resourceNames, messageTypes));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  ExpandRequest request =\n",
-            "      ExpandRequest.newBuilder().setContent(\"content951530617\").setInfo(\"info3237038\").build();\n",
-            "  ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);\n",
-            "  for (EchoResponse response : stream) {\n",
-            "    // Do something when a response is received.\n",
-            "  }\n",
+            "EchoClient echoClient = EchoClient.create();\n",
+            "ExpandRequest request =\n",
+            "    ExpandRequest.newBuilder().setContent(\"content951530617\").setInfo(\"info3237038\").build();\n",
+            "ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request);\n",
+            "for (EchoResponse response : stream) {\n",
+            "  // Do something when a response is received.\n",
             "}");
     Assert.assertEquals(results, expected);
   }
@@ -349,17 +345,15 @@ void composeClassHeaderSample_firstMethodIsInternal() {
                 service, clientType, resourceNames, messageTypes));
     String expected =
         LineFormatter.lines(
-            "try (EchoServiceSelectiveApiClient echoServiceSelectiveApiClient =\n"
-                + "    EchoServiceSelectiveApiClient.create()) {\n"
-                + "  EchoRequest request =\n"
-                + "      EchoRequest.newBuilder()\n"
-                + "          .setName(FoobarName.of(\"[PROJECT]\", \"[FOOBAR]\").toString())\n"
-                + "          .setParent(\n"
-                + "              FoobarbazName.ofProjectFoobarbazName(\"[PROJECT]\", \"[FOOBARBAZ]\").toString())\n"
-                + "          .setFoobar(Foobar.newBuilder().build())\n"
-                + "          .build();\n"
-                + "  EchoResponse response = echoServiceSelectiveApiClient.chatShouldGenerateAsUsual(request);\n"
-                + "}");
+            "EchoServiceSelectiveApiClient echoServiceSelectiveApiClient =\n"
+                + "    EchoServiceSelectiveApiClient.create();\n"
+                + "EchoRequest request =\n"
+                + "    EchoRequest.newBuilder()\n"
+                + "        .setName(FoobarName.of(\"[PROJECT]\", \"[FOOBAR]\").toString())\n"
+                + "        .setParent(FoobarbazName.ofProjectFoobarbazName(\"[PROJECT]\", \"[FOOBARBAZ]\").toString())\n"
+                + "        .setFoobar(Foobar.newBuilder().build())\n"
+                + "        .build();\n"
+                + "EchoResponse response = echoServiceSelectiveApiClient.chatShouldGenerateAsUsual(request);");
     Assert.assertEquals(results, expected);
   }
 
@@ -419,8 +413,8 @@ void composeClassHeaderSample_allMethodsAreInternal() {
                 service, clientType, resourceNames, messageTypes));
     String expected =
         LineFormatter.lines(
-            "try (EchoServiceSelectiveApiClient echoServiceSelectiveApiClient =\n"
-                + "    EchoServiceSelectiveApiClient.create()) {}");
+            "EchoServiceSelectiveApiClient echoServiceSelectiveApiClient =\n"
+                + "    EchoServiceSelectiveApiClient.create();");
     Assert.assertEquals(expected, results);
   }
 
@@ -578,13 +572,11 @@ void valid_composeShowcaseMethodSample_pagedRpcWithMultipleMethodArguments() {
                 method, clientType, arguments, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  List<String> resourceName = new ArrayList<>();\n",
-            "  String filter = \"filter-1274492040\";\n",
-            "  for (Content element : echoClient.listContent(resourceName, filter).iterateAll())"
-                + " {\n",
-            "    // doThingsWith(element);\n",
-            "  }\n",
+            "EchoClient echoClient = EchoClient.create();\n",
+            "List<String> resourceName = new ArrayList<>();\n",
+            "String filter = \"filter-1274492040\";\n",
+            "for (Content element : echoClient.listContent(resourceName, filter).iterateAll()) {\n",
+            "  // doThingsWith(element);\n",
             "}");
     Assert.assertEquals(results, expected);
   }
@@ -663,10 +655,9 @@ void valid_composeShowcaseMethodSample_pagedRpcWithNoMethodArguments() {
                 method, clientType, arguments, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  for (Content element : echoClient.listContent().iterateAll()) {\n",
-            "    // doThingsWith(element);\n",
-            "  }\n",
+            "EchoClient echoClient = EchoClient.create();\n",
+            "for (Content element : echoClient.listContent().iterateAll()) {\n",
+            "  // doThingsWith(element);\n",
             "}");
     Assert.assertEquals(results, expected);
   }
@@ -855,9 +846,8 @@ void valid_composeShowcaseMethodSample_lroUnaryRpcWithNoMethodArgument() {
                 method, clientType, Collections.emptyList(), resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  WaitResponse response = echoClient.waitAsync().get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "WaitResponse response = echoClient.waitAsync().get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -940,10 +930,9 @@ void valid_composeShowcaseMethodSample_lroRpcWithReturnResponseType() {
                 method, clientType, arguments, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  Duration ttl = Duration.newBuilder().build();\n",
-            "  WaitResponse response = echoClient.waitAsync(ttl).get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "Duration ttl = Duration.newBuilder().build();\n",
+            "WaitResponse response = echoClient.waitAsync(ttl).get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -1022,10 +1011,9 @@ void valid_composeShowcaseMethodSample_lroRpcWithReturnVoid() {
                 method, clientType, arguments, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  Duration ttl = Duration.newBuilder().build();\n",
-            "  echoClient.waitAsync(ttl).get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "Duration ttl = Duration.newBuilder().build();\n",
+            "echoClient.waitAsync(ttl).get();");
     Assert.assertEquals(results, expected);
   }
 
diff --git a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientMethodSampleComposerTest.java b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientMethodSampleComposerTest.java
index d1b93a932ab3..eb53d4373dd4 100644
--- a/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientMethodSampleComposerTest.java
+++ b/sdk-platform-java/gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/samplecode/ServiceClientMethodSampleComposerTest.java
@@ -86,16 +86,15 @@ void valid_composeDefaultSample_isPagedMethod() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  PagedExpandRequest request =\n",
-            "      PagedExpandRequest.newBuilder()\n",
-            "          .setContent(\"content951530617\")\n",
-            "          .setPageSize(883849137)\n",
-            "          .setPageToken(\"pageToken873572522\")\n",
-            "          .build();\n",
-            "  for (EchoResponse element : echoClient.pagedExpand(request).iterateAll()) {\n",
-            "    // doThingsWith(element);\n",
-            "  }\n",
+            "EchoClient echoClient = EchoClient.create();\n",
+            "PagedExpandRequest request =\n",
+            "    PagedExpandRequest.newBuilder()\n",
+            "        .setContent(\"content951530617\")\n",
+            "        .setPageSize(883849137)\n",
+            "        .setPageToken(\"pageToken873572522\")\n",
+            "        .build();\n",
+            "for (EchoResponse element : echoClient.pagedExpand(request).iterateAll()) {\n",
+            "  // doThingsWith(element);\n",
             "}");
     Assert.assertEquals(results, expected);
   }
@@ -208,10 +207,9 @@ void valid_composeDefaultSample_hasLroMethodWithReturnResponse() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  WaitRequest request = WaitRequest.newBuilder().build();\n",
-            "  echoClient.waitAsync(request).get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "WaitRequest request = WaitRequest.newBuilder().build();\n",
+            "echoClient.waitAsync(request).get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -277,10 +275,9 @@ void valid_composeDefaultSample_hasLroMethodWithReturnVoid() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  WaitRequest request = WaitRequest.newBuilder().build();\n",
-            "  WaitResponse response = echoClient.waitAsync(request).get();\n",
-            "}");
+            "EchoClient echoClient = EchoClient.create();\n",
+            "WaitRequest request = WaitRequest.newBuilder().build();\n",
+            "WaitResponse response = echoClient.waitAsync(request).get();");
     Assert.assertEquals(results, expected);
   }
 
@@ -328,18 +325,17 @@ void valid_composeDefaultSample_pureUnaryReturnVoid() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  EchoRequest request =\n",
-            "      EchoRequest.newBuilder()\n",
-            "          .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "EchoClient echoClient = EchoClient.create();\n",
+            "EchoRequest request =\n",
+            "    EchoRequest.newBuilder()\n",
+            "        .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "        .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setSeverity(Severity.forNumber(0))\n",
-            "          .setFoobar(Foobar.newBuilder().build())\n",
-            "          .build();\n",
-            "  echoClient.echo(request);\n",
-            "}");
+            "        .setSeverity(Severity.forNumber(0))\n",
+            "        .setFoobar(Foobar.newBuilder().build())\n",
+            "        .build();\n",
+            "echoClient.echo(request);");
     Assert.assertEquals(results, expected);
   }
 
@@ -390,18 +386,17 @@ void valid_composeDefaultSample_pureUnaryReturnResponse() {
                 method, clientType, resourceNames, messageTypes, service));
     String expected =
         LineFormatter.lines(
-            "try (EchoClient echoClient = EchoClient.create()) {\n",
-            "  EchoRequest request =\n",
-            "      EchoRequest.newBuilder()\n",
-            "          .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "EchoClient echoClient = EchoClient.create();\n",
+            "EchoRequest request =\n",
+            "    EchoRequest.newBuilder()\n",
+            "        .setName(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
+            "        .setParent(FoobarName.ofProjectFoobarName(\"[PROJECT]\","
                 + " \"[FOOBAR]\").toString())\n",
-            "          .setSeverity(Severity.forNumber(0))\n",
-            "          .setFoobar(Foobar.newBuilder().build())\n",
-            "          .build();\n",
-            "  EchoResponse response = echoClient.echo(request);\n",
-            "}");
+            "        .setSeverity(Severity.forNumber(0))\n",
+            "        .setFoobar(Foobar.newBuilder().build())\n",
+            "        .build();\n",
+            "EchoResponse response = echoClient.echo(request);");
     Assert.assertEquals(results, expected);
   }