If the Drupal 'queue' service implements this interface, the garbageCollection() method will be called during cron. Hierarchy

public DatabaseQueue::createQueue() Creates

public QueueInterface::createItem($data) Adds

public Memory::deleteQueue() Deletes a queue

public BatchMemory::claimItem($lease_time = 0)

public QueueFactory::get($name, $reliable = FALSE)

public DatabaseQueue::garbageCollection() Cleans

public QueueWorkerManager::createInstance($plugin_id, array $configuration

public DatabaseQueue::schemaDefinition() Defines

Default queue implementation. Hierarchy class \Drupal\Core\Queue\