protected function getItems($a_ref_id, array $a_current_filter = NULL)
 {
     global $rbacreview;
     $this->determineOffsetAndOrder();
     foreach ($rbacreview->getOperations() as $op) {
         $this->operations[$op["ops_id"]] = $op["operation"];
     }
     // special case: role folder should display root folder entries
     if ($a_ref_id == ROLE_FOLDER_ID) {
         $a_ref_id = ROOT_FOLDER_ID;
     }
     $data = ilRbacLog::getLogItems($a_ref_id, $this->getLimit(), $this->getOffset(), $a_current_filter);
     $this->setData($data["set"]);
     $this->setMaxCount($data["cnt"]);
 }