formerOwner: anElementOrNil
"Set my former or remove property of argument is nil"
anElementOrNil
ifNil: [ self removeProperty: #formerOwner ]
ifNotNil: [ self setProperty: #formerOwner toValue:
anElementOrNil ]I'd prefer to see a #setProperty:toValueOrRemove: there, as that pattern is used a lot. Stephan
