public function canAddPatientToQueue(\Patient $patient, Queue $queue)
{
$qs_svc = Yii::app()->service->getService('PatientTicketing_QueueSet');
$qs_r = $qs_svc->getQueueSetForQueue($queue->id);
return $qs_svc->canAddPatientToQueueSet($patient, $qs_r->getId());
}