/**
  * @see EPSInterface::getSiteById()
  */
 public function getSiteById($sessionId, $siteId)
 {
     try {
         $getSiteByIdStdObject = new stdClass();
         $getSiteByIdStdObject->sessionId = $sessionId;
         $getSiteByIdStdObject->siteId = $siteId;
         $response = parent::getSiteById($getSiteByIdStdObject);
         if (isset($response->return)) {
             $resultSite = new ResultSite($response->return);
         } else {
             $resultSite = null;
         }
         return $resultSite;
     } catch (SoapFault $sf) {
         throw new ServerException($sf);
     }
 }