Restore TestPlan.getTestIdentifier(String) because it's used by Gradle

Author: marcphilipp

documentation/src/docs/asciidoc/release-notes/release-notes-6.0.0-M1.adoc

@@ -63,6 +63,7 @@ repository on GitHub.
   - `LegacyReportingUtils` class
   - `TestPlan.add(TestIdentifier)`, `TestPlan.getChildren(String)`, and
     `TestPlan.getTestIdentifier(String)` methods
+  - `TestPlan.add(TestIdentifier)` and `TestPlan.getChildren(String)` methods
   - `@UseTechnicalNames` annotation
   - `EngineTestKit.execute(String, EngineDiscoveryRequest)`,
     `EngineTestKit.execute(TestEngine, EngineDiscoveryRequest)`, and

junit-platform-launcher/src/main/java/org/junit/platform/launcher/TestPlan.java

@@ -13,6 +13,7 @@
 import static java.util.Collections.emptySet;
 import static java.util.Collections.synchronizedSet;
 import static java.util.Collections.unmodifiableSet;
+import static org.apiguardian.api.API.Status.DEPRECATED;
 import static org.apiguardian.api.API.Status.EXPERIMENTAL;
 import static org.apiguardian.api.API.Status.INTERNAL;
 import static org.apiguardian.api.API.Status.MAINTAINED;
@@ -172,6 +173,23 @@ public Set<TestIdentifier> getChildren(UniqueId parentId) {
 		return children.containsKey(parentId) ? unmodifiableSet(children.get(parentId)) : emptySet();
 	}
 
+	/**
+	 * Get the {@link TestIdentifier} with the supplied unique ID.
+	 *
+	 * @param uniqueId the unique ID to look up the identifier for; never
+	 * {@code null} or blank
+	 * @return the identifier with the supplied unique ID; never {@code null}
+	 * @throws PreconditionViolationException if no {@code TestIdentifier}
+	 * with the supplied unique ID is present in this test plan
+	 * @deprecated Use {@link #getTestIdentifier(UniqueId)}
+	 */
+	@API(status = DEPRECATED, since = "1.10", consumers = "Gradle")
+	@Deprecated
+	public TestIdentifier getTestIdentifier(String uniqueId) throws PreconditionViolationException {
+		Preconditions.notBlank(uniqueId, "unique ID must not be null or blank");
+		return getTestIdentifier(UniqueId.parse(uniqueId));
+	}
+
 	/**
 	 * Get the {@link TestIdentifier} with the supplied unique ID.
 	 *