how to add range the query of the contract class in D365 code.

 private void initQuery(Contractclass _contract)
    {
        query   = _contract.getQuery();
        wmsQBDS = query.dataSourceTable(tableNum(inventtable));

        QueryBuildRange      errorRange = wmsQBDS.addRange(fieldNum(inventtable, Isopen));

        errorRange.value(queryValue(NoYes::No));
        errorRange.status(RangeStatus::Locked);

        QueryBuildDataSource QBDS =

       QBDS.addDataSource(tableNum(NewTable));
        wmsHeaderQBDS.relations(true);
        wmsHeaderQBDS.joinMode(JoinMode::ExistsJoin);
        SysQuery::findOrCreateRange(wmsHeaderQBDS, fieldNum(NewTable, Newfield)).value('newrange');
     
    }