public function getEventsManager() {
    if (!is_object(parent::getEventsManager())) {
      $em = $this->getUserOption('eventsManager');
      if (!is_object($em)) {
        $em = new EventsManager();
      }
      $em->enablePriorities(true);
      $this->setEventsManager($em);
    }
    return parent::getEventsManager();
  }