class ActionDispatch::Session::CookieStore

def unpacked_cookie_data(env)
  env["action_dispatch.request.unsigned_session_cookie"] ||= begin
    stale_session_check! do
      request = ActionDispatch::Request.new(env)
      if data = request.cookie_jar.signed[@key]
        data.stringify_keys!
      end
      data || {}
    end
  end
end