All classes that implement SchedulerInterface in Ultimate Cron 8.2
- class \Drupal\ultimate_cron\Plugin\ultimate_cron\Scheduler\Crontab
- class \Drupal\ultimate_cron\Plugin\ultimate_cron\Scheduler\SchedulerBase implements SchedulerInterface
- class \Drupal\ultimate_cron\Plugin\ultimate_cron\Scheduler\Simple