For information on converting to InterSystems IRIS, see the
InterSystems IRIS Adoption Guide
and the InterSystems IRIS In-Place Conversion Guide,
both available on the WRC Distributions page (login required).
This callback method is invoked by the %Delete() method to
provide notification that the object specified by oid has been deleted.
The callback occurs immediately after %DeleteData has been called. If %DeleteData returns
an error then %OnAfterDelete is not called.
If %OnAfterDelete returns an error (%Status) then the transaction is rolled back.