const content = "response_content"
	backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte(r.URL.RawQuery))
	}))
	defer backend.Close()
	backendURL, err := url.Parse(backend.URL)
	if err != nil {
		t.Fatal(err)
	}
	proxyHandler := newProxy(backendURL)

      return waitFor(closingFunction5, ClosingFunction5.class);
    }

    <T> T waitFor(final T delegate, final Class<T> type) {
      checkState(proxy == null);
      T proxyObject =
          Reflection.newProxy(
              type,
              new InvocationHandler() {
                @Override
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {

      return waitFor(closingFunction5, ClosingFunction5.class);
    }

    <T> T waitFor(final T delegate, final Class<T> type) {
      checkState(proxy == null);
      T proxyObject =
          Reflection.newProxy(
              type,
              new InvocationHandler() {
                @Override
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {