code: function orderAndSort(sortConf) {
      return {
          sortFieldName: sortConf.sortBy,
          sortDesc: sortConf.sortAsc === undefined ? false : !sortConf.sortAsc
      };
  }
docs: Build sort infotmation.
  @param  {object} sortConf - The sort configuration.
  @return {object} - The builded sort configuration.