Expanded class hierarchy of StorageItem in Express 8
- class \Drupal\Core\KeyValueStore\StorageBase implements KeyValueStoreInterface
- class \Drupal\Core\KeyValueStore\DatabaseStorage uses DependencySerializationTrait
- class \Drupal\Core\KeyValueStore\MemoryStorage
- class \Drupal\bootstrap\Utility\Storage implements \Drupal\bootstrap\Utility\Iterator
- class \Drupal\bootstrap\Utility\StorageItem implements \Drupal\bootstrap\Utility\Iterator
- class \Drupal\mongodb\KeyvalueMongodb implements KeyValueStoreExpirableInterface
- class \Drupal\mongodb_storage\KeyValueStore implements KeyValueStoreInterface