Document abstract object's exception() approach in more details.
Document abstract object's exception() approach in more details.

atk4/atk4,atk4/atk4,svisystem/atk4,xepan/atk4,xepan/atk4,svisystem/atk4,samratcis/atk4,atk4/atk4,atk4/atk4,samratcis/atk4,xepan/atk4,samratcis/atk4,svisystem/atk4