On Mon, Mar 7, 2011 at 2:52 PM, Tony Garnock-Jones <tonyg at ccs.neu.edu> wrote:

> I've previously tried to figure out whether it'd be possible to fake it in
> this area, defining some classes SystemCategory, MessageCategory as wrappers
> that know how to get at the information they need that is stored elsewhere.
> I never managed to figure out a way of doing it though. Would something like
> that be a worthwhile half-step on the way toward having proper reified
> Categories and so on?

That's exactly the approach taken by OmniBrowser.

Colin