D365FFO – AX – QueryBuildDataSource SortOrder syntax

static void Cyborg3QueryBuild2(Args _args)
{
    Query   query;
    QueryRun    qr;
    QueryBuildDataSource    qbds;
    QueryBuildRange qbr;
    VendTable   vendTable;
    
    query = new query();
    qbds = query.addDataSource(tableNum(vendTable));
    qbr =   qbds.addRange(fieldNum(vendTable, VendGroup));   
    qbr.value('10');

//here is the line where I thought I could control the sort direction

    qbds.addSortField(fieldNum(vendTable, AccountNum),SortOrder::Ascending);
    qr = new QueryRun(query);
    
    if(qr.prompt())
    {
      while(qr.next())  
        {
            vendTable = qr.get(tableNum(vendTable));
            info( vendTable.AccountNum);
        }
    }
    
    
}