ruby - HTTParty : 未定義のメソッド「コード」エラー

Question

取得エラー: ./http.rb:13: 未定義のメソッド `code' for # (NoMethodError)

#!/usr/bin/ruby

require 'rubygems'
require 'httparty'

class Foo
  include HTTParty
end

# Simple get with full url
r = Foo.get('http://www.google.com/')

p r.code