David Heinemeier Hansson wrote:
> I've been puzzled by this myself. There has been many times where I've 
> wanted to fake the appearance of a collection within a class without 
> actually making another class just for the purpose.
> 
> Could this perhaps make it in as an RCR?

I'm glad I'm not the only one. I have now added this as an RCR:
http://www.wobblini.net/rcr/RCR/RCR201

Please check it out and vote! :)