code: public function pnrDisplayHistory(RequestOptions\PnrDisplayHistoryOptions $options, $messageOptions = [])
      {
          $msgName = 'PNR_DisplayHistory';
  
          return $this->callMessage($msgName, $options, $messageOptions);
      }
docs: PNR_DisplayHistory
  
  @param RequestOptions\PnrDisplayHistoryOptions $options
  @param array $messageOptions (OPTIONAL)
  @return Result
  @throws Client\InvalidMessageException
  @throws Client\RequestCreator\MessageVersionUnsupportedException
  @throws Exception