StorageInterface

class \Drupal\Core\Config\CachedStorage extends \Drupal\Core\Config\StorageInterface, \Drupal\Core\Config\StorageCacheInterface uses \Drupal\Core\DependencyInjection\DependencySerializationTrait
class \Drupal\Core\Config\DatabaseStorage extends \Drupal\Core\Config\StorageInterface uses \Drupal\Core\DependencyInjection\DependencySerializationTrait
class \Drupal\Core\Config\ExtensionInstallStorage implements \Drupal\Core\Config\InstallStorage
class \Drupal\Core\Config\FileStorage extends \Drupal\Core\Config\StorageInterface
class \Drupal\Core\Config\InstallStorage implements \Drupal\Core\Config\FileStorage
class \Drupal\Core\Config\ManagedStorage extends \Drupal\Core\Config\StorageInterface
class \Drupal\Core\Config\MemoryStorage extends \Drupal\Core\Config\StorageInterface
class \Drupal\Core\Config\NullStorage extends \Drupal\Core\Config\StorageInterface
class \Drupal\Core\Config\ReadOnlyStorage extends \Drupal\Core\Config\StorageInterface
class \Drupal\Tests\Core\Config\TestStorage implements \Drupal\Core\Config\MemoryStorage
class \Drupal\config\StorageReplaceDataWrapper extends \Drupal\Core\Config\StorageInterface uses \Drupal\Core\DependencyInjection\DependencySerializationTrait
class \Drupal\config_test\TestInstallStorage implements \Drupal\Core\Config\InstallStorage

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.