newbie: detect method deprecation reflectively?

(Apologies if this is duplicate - Google gave me an error on my first

I'd like to check reflectively whether a method is deprecated, but I
don't see a method or attribute to do that. I do see

But it's not in my system (ruby 1.8.5 (2006-08-25) [i386-mswin32],
Rails 1.1.6). It should be possible to do this since the system
issues deprecation warnings.


Thanks in advance -