[Zope-dev] Inheritance isn't working, or Mystery of the Missing Doc Strings

Food ZClass inherits from ZWorkflow ZClass, and from a python base class FoodBase that inherits from OFS.ObjectManager.ObjectManager. So, calls to objectItems should be "sent" to FoodBase, who then "sends" them to ObjectManager. Instead, I get an error saying "Missing doc string"!!! Just to explain fully, ZWorkflow inherits from python class Workflow which in turn inherits from CatalogAware. None of the above define objectItems anywhere. What's going here? And why do the things always happen when I'm on a deadline?