LockBackendInterface

class \Drupal\Core\Lock\DatabaseLockBackend extends \Drupal\Core\Lock\LockBackendAbstract
class \Drupal\Core\Lock\LockBackendAbstract implements \Drupal\Core\Lock\LockBackendInterface
class \Drupal\Core\Lock\NullLockBackend implements \Drupal\Core\Lock\LockBackendInterface
class \Drupal\Core\Lock\PersistentDatabaseLockBackend extends \Drupal\Core\Lock\DatabaseLockBackend
class \Drupal\Core\ProxyClass\Lock\DatabaseLockBackend implements \Drupal\Core\Lock\LockBackendInterface uses \Drupal\Core\DependencyInjection\DependencySerializationTrait
class \Drupal\Core\ProxyClass\Lock\PersistentDatabaseLockBackend implements \Drupal\Core\Lock\LockBackendInterface uses \Drupal\Core\DependencyInjection\DependencySerializationTrait