Model/PageManager.php
public function afterZoneUnpublish(Event $event)
    {
        $zone = $event->getZone();
        $em = $this->getDoctrine()->getManager();
        foreach($em->getRepository('KitpagesCmsBundle:Page')->findByZone($zone) as $page) {
            $this->unpublish($page);
        }
    }
public function afterZoneUnpublish(Event $event)
    {
        $zone = $event->getZone();
        $em = $this->getDoctrine()->getManager();
        foreach($em->getRepository('KitpagesCmsBundle:Page')->findByZone($zone) as $page) {
            $this->unpublish($page);
        }
    }
//