public function beforeFilter(\Cake\Event\Event $event)
 {
     parent::beforeFilter($event);
     $this->loadMainNavigation();
 }
 /**
  * Pass this call through to the CrudView plugin
  *
  * @param Event $event
  */
 public function beforeRender(Event $event)
 {
     parent::beforeRender($event);
     // do whatever else you want
 }