class ActionDispatch::Cookies::PermanentCookieJar

def []=(key, options)
  if options.is_a?(Hash)
    options.symbolize_keys!
  else
    options = { :value => options }
  end
  options[:expires] = 20.years.from_now
  @parent_jar[key] = options
end

def initialize(parent_jar, secret)
  @parent_jar, @secret = parent_jar, secret
end

def method_missing(method, *arguments, &block)
  @parent_jar.send(method, *arguments, &block)
end

def signed
  @signed ||= SignedCookieJar.new(self, @secret)
end