gistfile2.rbx

module M
  module ClassMethods
    def foo
      bar
    end
    private 
      def bar
        'bar'
      end
  end
end

class C 
  extend M::ClassMethods
end

What's wrong with this Ruby?

module M
  module ClassMethods
    def foo
      self.bar
    end
    private 
      def bar
        'bar'
      end
  end
end

class C 
  extend M::ClassMethods
end