All classes that implement EntityFieldManagerInterface in Zircon Profile 8
- class \Drupal\Core\Entity\EntityFieldManager implements EntityFieldManagerInterface uses UseCacheBackendTrait, StringTranslationTrait
- class \Drupal\Core\Entity\EntityManager implements EntityManagerInterface, ContainerAwareInterface uses ContainerAwareTrait
- class \Drupal\Tests\Core\Entity\TestEntityFieldManager