module KnifeCookbookUtils::RLet

This is ActiveSupport::Concern, taken from github.com/rails/rails/blob/6794e92b204572d75a07bd6413bdae6ae22d5a82/activesupport/lib/active_support/concern.rb

If ActiveSupport::Concern is loaded, it will use that instead

Rails license:

https://github.com/rails/rails/blob/6794e92b204572d75a07bd6413bdae6ae22d5a82/activesupport/MIT-LICENSE