How to add SalesParmUpdate.specQty

First add a new element in SalesUpdate enum.

example: add JJK_TestElement in SalesUpdate enum.
After that add a logic in SalesQuantity class for the new added enum. There are 2 method in SalesQuantity class that can be use to calculate qty, which are calcQtySales and calcQtyInvent.

example: SalesQuantity_xxx.calcQtySales

switch(_specQty)
{
...
            //-->   add your logic
            case SalesUpdate::JJK_TestElement:
                qtyUpdate = this.salesDeliverNow(salesLine);
                if( !qtyUpdate )
                {
                    qtyUpdate = JJK_SalesLineDetails::calcUnInvoiceTicketedQty(salesLine);
                }
                break;
            //<--   add your logic
...
...
}