From: Steve Klabnik <steve@...>
Date: 2012-04-06T07:05:55+09:00
Subject: Re: Design pattern question

Insert a 'def bar; puts "bar"; end' into my Abstract class, the end
point is still the same. Adding an empty method that throws a slightly
different error doesn't really do anything worthwhile in my opinion.
If it makes you happy, then do it.