/**
  * builds the data one would send in a POST request
  */
 function to_postdata($multi = false)
 {
     //echo "multi=" . $multi . '`';
     if ($multi) {
         return ns_OAuthUtil::build_http_query_multi($this->parameters);
     } else {
         return ns_OAuthUtil::build_http_query($this->parameters);
     }
 }