diff --git a/core/lib/Drupal/Core/TypedData/Validation/PropertyContainerMetadata.php b/core/lib/Drupal/Core/TypedData/Validation/PropertyContainerMetadata.php
index f5850eb..b72c341 100644
--- a/core/lib/Drupal/Core/TypedData/Validation/PropertyContainerMetadata.php
+++ b/core/lib/Drupal/Core/TypedData/Validation/PropertyContainerMetadata.php
@@ -9,13 +9,13 @@
 
 use Drupal\Core\TypedData\ComplexDataInterface;
 use Drupal\Core\TypedData\ListInterface;
-use Symfony\Component\Validator\PropertyMetadataContainerInterface;
+use Symfony\Component\Validator\Mapping\ClassMetadataInterface;
 use Symfony\Component\Validator\ValidationVisitorInterface;
 
 /**
  * Typed data implementation of the validator MetadataInterface.
  */
-class PropertyContainerMetadata extends Metadata implements PropertyMetadataContainerInterface {
+class PropertyContainerMetadata extends Metadata implements ClassMetadataInterface {
 
   /**
    * Overrides Metadata::accept().
@@ -65,4 +65,63 @@ public function getPropertyMetadata($property_name) {
       throw new \LogicException("There are no known properties.");
     }
   }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getClassName()
+    {
+        // TODO: Implement getClassName() method.
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getConstrainedProperties()
+    {
+        // TODO: Implement getConstrainedProperties() method.
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasGroupSequence()
+    {
+        // TODO: Implement hasGroupSequence() method.
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getGroupSequence()
+    {
+        // TODO: Implement getGroupSequence() method.
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isGroupSequenceProvider()
+    {
+        // TODO: Implement isGroupSequenceProvider() method.
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCascadingStrategy()
+    {
+        // TODO: Implement getCascadingStrategy() method.
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTraversalStrategy()
+    {
+        // TODO: Implement getTraversalStrategy() method.
+    }
+
+
 }
+