function GroupAddGroup takes group sourceGroup, group destGroup returns nothing
// If the user wants the group destroyed, remember that fact and clear
// the flag, in case it is used again in the callback.
local boolean wantDestroy = bj_wantDestroyGroup
set bj_wantDestroyGroup = false
set bj_groupAddGroupDest = destGroup
call ForGroup(sourceGroup, function GroupAddGroupEnum)
// If the user wants the group destroyed, do so now.
if (wantDestroy) then
call DestroyGroup(sourceGroup)
endif
endfunction