https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21KeyValueStore%21KeyValueDatabaseExpirableFactory.php/class/hierarchy/KeyValueDatabaseExpirableFactory/11.x
KeyValueDatabaseExpirableFactory | Drupal API
drupalapi
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21KeyValueStore%21KeyValueDatabaseExpirableFactory.php/property/KeyValueDatabaseExpirableFactory%3A%3Aserializer/10
KeyValueDatabaseExpirableFactory::$serializer | Drupal API
serializerdrupalapi