kivy/kivy — pull request #1813 by Zen-CODE (2014-01-25 15:10:41+00:00)
Title: Force existing superclass for dynamic classes

This PR addresses https://github.com/kivy/kivy/issues/1791

I am concerned about overhead though. Each dynamic class definition will now have to walk through all Kivy class definitions and dynamic class definitions. Is there a better way?