inherited_with_helper

# File actionmailer/lib/action_mailer/helpers.rb, line 92
        def inherited_with_helper(child)
          inherited_without_helper(child)
          begin
            child.master_helper_module = Module.new
            child.master_helper_module.__send__(:include, master_helper_module)
            child.helper child.name.to_s.underscore
          rescue MissingSourceFile => e
            raise unless e.is_missing?("helpers/#{child.name.to_s.underscore}_helper")
          end
        end