EntityDisplayModeInterface

class \Drupal\Core\Entity\EntityDisplayModeBase extends \Drupal\Core\Config\Entity\ConfigEntityBase implements \Drupal\Core\Entity\EntityDisplayModeInterface
class \Drupal\Core\Entity\Entity\EntityFormMode extends \Drupal\Core\Entity\EntityDisplayModeBase implements \Drupal\Core\Entity\EntityFormModeInterface
class \Drupal\Core\Entity\Entity\EntityViewMode extends \Drupal\Core\Entity\EntityDisplayModeBase implements \Drupal\Core\Entity\EntityViewModeInterface