All classes that implement FileInterface in Drupal 8
- class \Drupal\file\Entity\File implements FileInterface uses EntityChangedTrait, EntityOwnerTrait
- class \Drupal\file_entity\Entity\FileEntity implements FileEntityInterface
- class \Drupal\file_url\Entity\RemoteFile
- class \Drupal\multiversion\Entity\File implements EntityPublishedInterface uses EntityPublishedTrait