function getProperties()
 {
     global $lng;
     // #11193
     $props = array();
     include_once "./Modules/BookingManager/classes/class.ilObjBookingPool.php";
     if (!ilObjBookingPool::_lookupOnline($this->obj_id)) {
         $props[] = array("alert" => true, "property" => $lng->txt("status"), "value" => $lng->txt("offline"));
     }
     return $props;
 }
 function _checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id = "")
 {
     global $ilUser, $rbacsystem;
     if ($a_user_id == "") {
         $a_user_id = $ilUser->getId();
     }
     // add no access info item and return false if access is not granted
     // $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $a_text, $a_data = "");
     //
     // for all RBAC checks use checkAccessOfUser instead the normal checkAccess-method:
     // $rbacsystem->checkAccessOfUser($a_user_id, $a_permission, $a_ref_id)
     if ($a_permission == "visible" && !$rbacsystem->checkAccessOfUser($a_user_id, 'write', $a_ref_id)) {
         include_once "Modules/BookingManager/classes/class.ilObjBookingPool.php";
         $pool = new ilObjBookingPool($a_ref_id);
         if ($pool->isOffline()) {
             return false;
         }
     }
     return true;
 }