Followup of TestContainer issue

Author: Pierstoval

stubs/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.stub

@@ -8,4 +8,9 @@ abstract class KernelTestCase
      * @var TestContainer
      */
     protected static $container;
+
+    /**
+     * @return TestContainer
+     */
+    abstract public function getContainer();
 }