/**
  * @see EPSInterface::getWeightInterval()
  */
 public function getWeightInterval($sessionId, $serviceTypeId, $senderSiteId, $receiverSiteId, $date, $documents, $senderCountryId, $senderPostCode, $receiverCountryId, $receiverPostCode)
 {
     try {
         $getWeightIntervalStdObject = new stdClass();
         $getWeightIntervalStdObject->sessionId = $sessionId;
         $getWeightIntervalStdObject->serviceTypeId = $serviceTypeId;
         $getWeightIntervalStdObject->senderSiteId = $senderSiteId;
         $getWeightIntervalStdObject->receiverSiteId = $receiverSiteId;
         $getWeightIntervalStdObject->date = $date;
         $getWeightIntervalStdObject->documents = $documents;
         $getWeightIntervalStdObject->senderCountryId = $senderCountryId;
         $getWeightIntervalStdObject->senderPostCode = $senderPostCode;
         $getWeightIntervalStdObject->receiverCountryId = $receiverCountryId;
         $getWeightIntervalStdObject->receiverPostCode = $receiverPostCode;
         $response = parent::getWeightInterval($getWeightIntervalStdObject);
         if (isset($response->return)) {
             $resultMinMaxReal = new ResultMinMaxReal($response->return);
         } else {
             $resultMinMaxReal = null;
         }
         return $resultMinMaxReal;
     } catch (SoapFault $sf) {
         throw new ServerException($sf);
     }
 }