Expanded class hierarchy of DatabaseStorage in Drupal 9
- class \Drupal\Core\KeyValueStore\StorageBase implements KeyValueStoreInterface
- class \Drupal\Core\KeyValueStore\DatabaseStorage uses DependencySerializationTrait
- class \Drupal\Core\KeyValueStore\DatabaseStorageExpirable implements KeyValueStoreExpirableInterface
- class \Drupal\supercache\KeyValueStore\ChainedStorage implements KeyValueStoreInterface uses ChainedStorageTrait
- class \Drupal\Core\KeyValueStore\MemoryStorage
- class \Drupal\Core\KeyValueStore\DatabaseStorage uses DependencySerializationTrait