Expanded class hierarchy of User

class \Drupal\Core\Entity\Entity implements \IteratorAggregate, EntityInterface
- class \Drupal\comment\Plugin\Core\Entity\Comment implements ContentEntityInterface
- class \Drupal\Core\Config\Entity\ConfigEntityBase implements ConfigEntityInterface
- class \Drupal\Core\Entity\EntityNG
- class \Drupal\entity_cache_test_dependency\Plugin\Core\Entity\EntityCacheTest
- class \Drupal\field_test\Plugin\Core\Entity\TestEntity
- class \Drupal\file\Plugin\Core\Entity\File implements ContentEntityInterface
- class \Drupal\node\Plugin\Core\Entity\Node implements ContentEntityInterface
- class \Drupal\taxonomy\Plugin\Core\Entity\Term implements ContentEntityInterface
- class \Drupal\taxonomy\Plugin\Core\Entity\Vocabulary
- class \Drupal\user\Plugin\Core\Entity\User