Xcode-like window menu?

FROM : Gerd Knops
DATE : Tue May 13 21:42:12 2008

I have a document based application with multiple windows per 
document, using window controllers.

I was hoping that the window menu would magically group windows 
belonging to the same document together, similar to what Xcode does. 
But apparently that is not the case. Am I missing something, or is 
that something that needs to be implemented from scratch?

Gerd