class Thing

  data :test

  def test_it; return data; end
  def test; return "horray!"; end

  private

  def data(method = nil)
    if method.nil? or @data_method.nil?
      @data_method = method
    else
      return self.send @data_method
    end
  end

  @data_method = nil
end


t = Thing.new
print t.test_if