private class methods

class Searchable
  module ClassMethods
    def magic
      puts "c"*100
      define_method(:instance_method) do
        self.class.class_helper
      end
    end

    private

    def class_helper
      puts "ch"*100
    end
  end
end

class C
  extend Searchable::ClassMethods

  magic
end

i = C.new
i.instance_method