change the configureSideMenu signature to use the AdminInterface

Author: rande

Admin/BaseMediaAdmin.php

@@ -12,10 +12,9 @@
 namespace Sonata\MediaBundle\Admin;
 
 use Sonata\AdminBundle\Admin\Admin;
+use Sonata\AdminBundle\Admin\AdminInterface;
 use Sonata\AdminBundle\Form\FormMapper;
-use Sonata\AdminBundle\Datagrid\DatagridMapper;
 use Sonata\AdminBundle\Datagrid\ListMapper;
-use Sonata\AdminBundle\Show\ShowMapper;
 use Sonata\AdminBundle\Route\RouteCollection;
 use Sonata\MediaBundle\Provider\Pool;
 use Sonata\MediaBundle\Form\DataTransformer\ProviderDataTransformer;
@@ -144,7 +143,7 @@ public function getNewInstance()
     /**
      * {@inheritdoc}
      */
-    protected function configureSideMenu(MenuItemInterface $menu, $action, Admin $childAdmin = null)
+    protected function configureSideMenu(MenuItemInterface $menu, $action, AdminInterface $childAdmin = null)
     {
         if (!in_array($action, array('edit', 'view'))) {
             return;