public function WorkflowGetRequestById($request_ids)
 {
     // $request_ids : IDType or this array
     $this->CheckAndSetHeader(__FUNCTION__);
     $reg_args["request_id"] = $this->getRegularArgs($request_ids, __FUNCTION__);
     $this->encodeString($reg_args);
     $results = parent::WorkflowGetRequestById($reg_args);
     $this->methodClose();
     return $this->decodeString($results);
 }