[Zope] getRoot() how?

[Peter Bengtsson]

In a product class I want to add a method that returns the root of the 
instance.

Suppose I have this URL:
http://localhost:8080/myProductInstance/subfolder/foldersub/useRoot()

Method useRoot() will get the 'myProductInstance' object and add some 
properties to it.

To do this you would do:

	root_instance = self.myProductInstance

But I can't know the name of the instance of course.
This would be another method:

	root_instance = self.superValues('Product Meta Type')[0]

Neither method is very neat. Is there a OO command to immediatly get the 
root of the instance?


Peter