Removing a declared class

I'm writing an article which compares some classes through an adaptor. Problem: Declaring the common adaptor will only work for the first time, later on I get a message saying that I can't redeclare the adaptor class. Question: Is there a function (I've tried unset) which can remove a declared class? Solution: I moved some includes about, and it worked fine for me, though I still feel that the question is relevant. -- Paul K Egell-Johnsen Developer/PR Manager zez.org: about code http://zez.org/