[Newbies] Howto find all subclass responsibilities for a given Class

[Felix Dorner]

Hi, 

I am playing around with Morphs to create a Board for the ancient Go
game. Given that I'd like to create a completely new kind of Morph
(i.e. a Class that extends Morph), I'd like to find out which methods
in the Morph class are defined as subclass responsibilities. Is there
any fast way to do such a kind of search?

Thanks,
Felix