v8.0
v8.0 v7.2 v7.1 v7.0 v6.1 v6.0 v5.2
GitHub

Required Files

Ruby on Rails 8.0.0

class.rb

activesupport/lib/active_support/core_ext/class.rb on GitHub

Required Files

active_support/core_ext/class/attribute
active_support/core_ext/class/subclasses