diff --git a/core/lib/Drupal/Core/TypedData/Validation/Metadata.php b/core/lib/Drupal/Core/TypedData/Validation/Metadata.php
index d6f0b21..8fb7c34 100644
--- a/core/lib/Drupal/Core/TypedData/Validation/Metadata.php
+++ b/core/lib/Drupal/Core/TypedData/Validation/Metadata.php
@@ -8,7 +8,10 @@
 namespace Drupal\Core\TypedData\Validation;
 
 use Drupal\Core\TypedData\TypedDataInterface;
+use Symfony\Component\Validator\Mapping\CascadingStrategy;
 use Symfony\Component\Validator\Mapping\ClassMetadataInterface;
+use Symfony\Component\Validator\Mapping\TraversalStrategy;
+use Symfony\Component\Validator\PropertyMetadataInterface;
 use Symfony\Component\Validator\ValidationVisitorInterface;
 
 /**
@@ -109,4 +112,60 @@ public function getClassName() {
     return get_class($this->typedData);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getConstrainedProperties() {
+    return array($this->name);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function hasGroupSequence() {
+    return FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getGroupSequence() {
+    return NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isGroupSequenceProvider() {
+    return FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCascadingStrategy() {
+    return CascadingStrategy::NONE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getTraversalStrategy() {
+    return TraversalStrategy::NONE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function hasPropertyMetadata($property) {
+    return $property == $this->name;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getPropertyMetadata($property) {
+    return $this->factory->getMetadataFor($this->typedData);
+  }
+
 }