OEModule\PatientTicketing\controllers\AdminController::actionLoadQueueNav PHP Method

    public function actionLoadQueueNav($id)
    {
        if (!($queue = models\Queue::model()->findByPk((int) $id))) {
            throw new \CHttpException(404, "Queue not found with id {$id}");
        }
        $root = $queue->getRootQueue();
        if (is_array($root)) {
            throw new \CHttpException(501, "Don't currently support queues with multiple roots");
        }
        $queueset = models\QueueSet::model()->findByAttributes(array('initial_queue_id' => $root->id));
        $resp = array('rootid' => $root->id, 'queuesetid' => $queueset->id, 'nav' => $this->renderPartial('queue_nav_item', array('queueset' => $queueset, 'queue' => $root), true));
        echo \CJSON::encode($resp);
    }