KeyValueStoreInterface

class \Drupal\Core\KeyValueStore\DatabaseStorage uses \Drupal\Core\DependencyInjection\DependencySerializationTrait implements \Drupal\Core\KeyValueStore\StorageBase
class \Drupal\Core\KeyValueStore\DatabaseStorageExpirable extends \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface implements \Drupal\Core\KeyValueStore\DatabaseStorage
class \Drupal\Core\KeyValueStore\MemoryStorage implements \Drupal\Core\KeyValueStore\StorageBase
class \Drupal\Core\KeyValueStore\NullStorageExpirable extends \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface
class \Drupal\Core\KeyValueStore\StorageBase extends \Drupal\Core\KeyValueStore\KeyValueStoreInterface

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