/**
  * process XML string response from LIST server method
  */
 protected function _internalListing($responseStatus, &$XMLObject, &$rows, &$resultInfo)
 {
     $rows = array();
     $resultInfo = array();
     $clients = $XMLObject->clients;
     $resultInfo['page'] = (string) $clients['page'];
     $resultInfo['perPage'] = (string) $clients['per_page'];
     $resultInfo['pages'] = (string) $clients['pages'];
     $resultInfo['total'] = (string) $clients['total'];
     foreach ($clients->children() as $key => $currXML) {
         $thisClient = new FreshBooks_Client();
         $thisClient->_internalLoadXML($currXML);
         $rows[] = $thisClient;
     }
 }