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- interface \Drupal\Core\Entity\ContentEntityInterface extends \Drupal\Core\Entity\Traversable \Drupal\Core\Entity\FieldableEntityInterface \Drupal\Core\Entity\TranslatableRevisionableInterface \Drupal\Core\Entity\SynchronizableInterface; interface \Drupal\Core\Entity\EntityChangedInterface extends \Drupal\Core\Entity\EntityInterface; interface \Drupal\user\EntityOwnerInterface
- interface \Drupal\content_entity_example\ContactInterface extends \Drupal\Core\Entity\ContentEntityInterface \Drupal\user\EntityOwnerInterface \Drupal\Core\Entity\EntityChangedInterface
