All classes that implement KeyValueStoreExpirableInterface in Drupal 9
- class \Drupal\Core\KeyValueStore\DatabaseStorageExpirable implements KeyValueStoreExpirableInterface
- class \Drupal\Core\KeyValueStore\NullStorageExpirable implements KeyValueStoreExpirableInterface
- class \Drupal\supercache\KeyValueStore\ChainedStorageExpirable implements KeyValueStoreExpirableInterface uses ChainedStorageTrait