docs: function(className, filters, callback) {
          /**
           * Callback for QB.data.list(className, filters, callback)
           * @callback listOfDataCallback
           * @param {object} error - The error object
           * @param {object} response - Object with Array of files
           */
  
          // make filters an optional parameter
          if (typeof callback === 'undefined' && typeof filters === 'function') {
              callback = filters;
              filters = null;
          }
          this.service.ajax({url: Utils.getUrl(config.urls.data, className), data: filters}, function(err,result){
              if (err) {
                  callback(err, null);
              } else {
                  callback (err, result);
              }
          });
      }