attr_accessor_with_default gone?

http://dev.rubyonrails.org/browser/trunk/activesupport/lib/active_support/core_ext/module/attr_accessor_with_default.rb

It looks like it was last updated around a month ago, but it in Rails 1.2.2 (ActiveSupport 1.4.1) it’s gone. I’m not having much luck navigating the rails svn site (Trac server errors) so I can’t see if it was removed.

Anyone using this in >= 1.2 ?
It’s a pretty handy method - would like to have it!