bee_hotel-1.x-dev/modules/beehotel_event/beehotel_event.module

<?php

/**
 * @file
 * Contains global features for Beehotel Event.
 */

use Drupal\beehotel_event\Util\EventMaintenance;

/**
 * Implements hook_cron().
 */
function beehotel_event_cron() {
  // Purge old bat_events.
  $eventMaintenance = new EventMaintenance();
  $eventMaintenance->deleteOldBatEvents([]);
}