docs: function () {
              log.info('response received');
              log.info(data.toString());
              log.info('running callback');
              var _callback = callback,
                  dataString = data.toString(),
                  parseHandler = function (err, xmlObject) {
                      log.info('callbackHandler initiated');
                      if (err) {
                          log.info('Error occured parsing data for requestHandler'.red, err);
                          if (typeof _callback === 'function') {
                              _callback(err);
                          }
                      } else if (typeof _callback === 'function') {
                          var res = zuora.createResultObject(xmlObject);
                          res.raw = dataString;
                          _callback(res.error, res);
                      }
                  };
              //xml to js
              parseXml(dataString, parseHandler);
          }