Issue #2100183 by plopesc: Remove the changed() method from EntityInterface.

core/lib/Drupal/Core/Entity/Entity.php

@@ -340,7 +340,7 @@ public function preSave(EntityStorageControllerInterface $storage_controller) {
    * {@inheritdoc}
    */
   public function postSave(EntityStorageControllerInterface $storage_controller, $update = TRUE) {
-    $this->changed();
+    $this->onSaveOrDelete();
   }
 
   /**
@@ -366,7 +366,7 @@ public static function preDelete(EntityStorageControllerInterface $storage_contr
    */
   public static function postDelete(EntityStorageControllerInterface $storage_controller, array $entities) {
     foreach ($entities as $entity) {
-      $entity->changed();
+      $entity->onSaveOrDelete();
     }
   }
 
@@ -384,9 +384,9 @@ public function referencedEntities() {
   }
 
   /**
-   * {@inheritdoc}
+   * Acts on an entity after it was saved or deleted.
    */
-  public function changed() {
+  protected function onSaveOrDelete() {
     $referenced_entities = array(
       $this->entityType() => array($this->id() => $this),
     );

core/lib/Drupal/Core/Entity/EntityInterface.php

@@ -235,9 +235,4 @@ public function entityInfo();
    */
   public function referencedEntities();
 
-  /**
-   * Acts on an entity after it was saved or deleted.
-   */
-  public function changed();
-
 }

core/modules/comment/tests/Drupal/comment/Tests/Entity/CommentLockTest.php

@@ -52,6 +52,7 @@ public function testLocks() {
     $methods = get_class_methods('Drupal\comment\Entity\Comment');
     unset($methods[array_search('preSave', $methods)]);
     unset($methods[array_search('postSave', $methods)]);
+    $methods[] = 'onSaveOrDelete';
     $comment = $this->getMockBuilder('Drupal\comment\Entity\Comment')
       ->disableOriginalConstructor()
       ->setMethods($methods)

core/modules/views_ui/lib/Drupal/views_ui/ViewUI.php

@@ -1160,11 +1160,4 @@ public function referencedEntities() {
      return $this->storage->referencedEntities();
    }
 
-   /**
-    * {@inheritdoc}
-    */
-   public function changed() {
-     return $this->storage->changed();
-   }
-
 }