You can use Cross references (right click - View references) to see all places where this method is called from.
And as mentioned, you should make sure that you always check that _common is VendPackingSlipJour before running your logic.
You can try to implement this also directly on the form but I'm not sure if Chain of Command works with methods of form data sources. It can be used in framework methods of form data sources and form controls, but I'm not sure if it works (yet) with new methods that were developed on the data source. I suggest you try and let us know the result!
Your Chain of Command class should look something like this (just typing out of my head, no guarantees):
[ExtensionOf(FormDataSourceStr(PurchJournalSelect_PackingSlip, VendPackingSlipJour)]
final class MyPurchJournalSelect_PackingSlipForm_VendPackingSlipJourDS_Extension
{
edit NoYes included(boolean set,
VendPackingSlipJour _vendPackingSlipJour,
NoYes _included)
{
// Add your code here if you want to run it before the standard code
NoYes ret = next included(set, _vendPackingSlipJour, _included);
// Add your code here if you want to run it after the standard code
return ret;
}
}
