[Zope-Checkins] CVS: Packages/ZClasses - Property.py:1.19

[Jim Fulton]

Update of /cvs-repository/Packages/ZClasses
In directory tarzan.digicool.com:/projects/users/jim/lib/python/ZClasses

Modified Files:
	Property.py 
Log Message:
Added a psuedo "subclassable propertysheet class interface" to prevent
us from inteheriting from propertysheet classes that weren't meant to
be subclassed.  This fixes a problem with creating property sheets for
subclasses of bilt-in classes like Folder.