From: SonOfLilit <sonoflilit@...>
Date: 2007-02-18T21:16:40+09:00
Subject: Re: Oppinions on RCR for dup on immutable classes

Say, why not just define Object#mutable? and solve the issue of not
knowing if dup is possible or not?

Sure, it only works to tell you about one possible reason it's not,
but it seems like a good workaround, far better than, say, duping just
to check.

Aur Saraf