FieldableEntityInterface

class \Drupal\Core\Entity\ContentEntityBase implements \Drupal\Core\Entity\IteratorAggregate, \Drupal\Core\Entity\ContentEntityInterface, \Drupal\Core\TypedData\TranslationStatusInterface uses \Drupal\Core\Entity\EntityChangesDetectionTrait, \Drupal\Core\Entity\SynchronizableEntityTrait extends \Drupal\Core\Entity\EntityBase
class \Drupal\Core\Entity\EditorialContentEntityBase implements \Drupal\Core\Entity\EntityChangedInterface, \Drupal\Core\Entity\EntityPublishedInterface, \Drupal\Core\Entity\RevisionLogInterface uses \Drupal\Core\Entity\EntityChangedTrait, \Drupal\Core\Entity\EntityPublishedTrait, \Drupal\Core\Entity\RevisionLogEntityTrait extends \Drupal\Core\Entity\ContentEntityBase
class \Drupal\Core\Entity\RevisionableContentEntityBase implements \Drupal\Core\Entity\RevisionLogInterface uses \Drupal\Core\Entity\RevisionLogEntityTrait extends \Drupal\Core\Entity\ContentEntityBase
class \Drupal\content_entity_example\Entity\Contact implements \Drupal\content_entity_example\ContactInterface uses \Drupal\Core\Entity\EntityChangedTrait extends \Drupal\Core\Entity\ContentEntityBase

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