Maybe more to the point: You do not want to *code a dependency on* what the implementing class may do as far as the returned result. :^)
"Brittle code" will eventually break. Murphy's Law says that it will break at the worst possible time for you to have to deal with it. :^D -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html