unpacked_cookie_data

# File actionpack/lib/action_dispatch/middleware/session/cookie_store.rb, line 93
      def unpacked_cookie_data(req)
        req.fetch_header("action_dispatch.request.unsigned_session_cookie") do |k|
          v = stale_session_check! do
            if data = get_cookie(req)
              data.stringify_keys!
            end
            data || {}
          end
          req.set_header k, v
        end
      end