so they must return the opposite value for themselves. They don't want to actually set their
values because the script could cancel. So the idea here is to let them know before the script
call that they should return their "future" value (the opposite of their current value)
b=42972 r=kmcclusk
git-svn-id: svn://10.0.0.236/trunk@75424 18797224-902f-48f8-a5cc-f745e15eee43