Getting list of classes

FROM : Drew McCormack
DATE : Mon Jan 14 20:16:07 2002

Is it possible to get a list of all classes in an application? So, is
there a method to return an array of all loaded classes?
I've looked in NSBundle, and NSApplication, and can't find anything.
Basically, I'm trying to avoid having to make a table of classes myself.
I thought it would be neat if I could just loop through all the classes,
sending each a "respondsToSelector:" message to making auxiliary lists
of classes for specific purposes.

Drew McCormack