/**
  * This app only cares about equipments as belonging to a certain room,
  * not for example, all of them globally, so Equipments instances are tied
  * to one certain Room.
  * @param \Rooms\Model\Room $room
  * @return $this
  */
 public function init(Room $room)
 {
     $this->room = $room;
     $this->setServiceLocator($room->getServiceLocator());
     $this->set_init();
     return $this;
 }