[plt-scheme] Question about classes (class.ss)

Hello,

My template systems for "external" classes, that I'm borrowing from 
another programming language and have mirrored into MzScheme, is 
evolving. Right now, I'm stuck with the following problem:

My template system should allow the super class to inherit all of its 
super class methods (incl. property getters and setters) to the new 
'external' class, provided the child class does not declare them. 
However, there is no way for a new 'external' class to know all 
superclass methods in advance.

Is there an official way for the child class to automatically inherit 
_all_ superclass methods _except_ the new methods defined in the 
child class?

In other words: With declaration (inherit-all), a child class should 
automatically override any superclass method with the same name, but 
otherwise inherit the superclass method.

Is that possible with MzScheme's class.ss library?

Regards,

Erich