[Zope-dev] REPOST: Cut down on the Available Objects list.

Hi, all - someone suggested to me that I should try the zope-dev list instead of the zope list, here goes. When I create ZClasses I can make the Available Objects shrink to just a couple of available objects via subclasses and so forth. How would I do this with a Python Class in a Python Zope Product? (Let's say an OFS.Folder.Folder class, which could normally contain all available objects.) Thanks :-)