/**
  * @see EPSInterface::createCustomTravelLabelPDFType1()
  */
 public function createCustomTravelLabelPDFType1($sessionId, $parcelId)
 {
     try {
         $createCustomTravelLabelPDFType1StdObject = new stdClass();
         $createCustomTravelLabelPDFType1StdObject->sessionId = $sessionId;
         $createCustomTravelLabelPDFType1StdObject->parcelId = $parcelId;
         $response = parent::createCustomTravelLabelPDFType1($createCustomTravelLabelPDFType1StdObject);
         if (isset($response->return)) {
             $resultPDF = $response->return;
         } else {
             $resultPDF = null;
         }
         return $resultPDF;
     } catch (SoapFault $sf) {
         throw new ServerException($sf);
     }
 }