rails/rails — comment on commit 071c8bf62ac7ffdb587268a6789fd825d0dae2a6
File:  line 0
By josevalim:

Bro, this is public. The same way some people are used to inherit from ActionController::Base, some inherit from ActiveRecord::Base. We need to deprecate it if we want to make it internal (the same for ActiveModel::TestCase).