    @Test
    public void testGetPrivateField() {

        Feign.Builder builder = Feign.builder();
        Request.Options options = (Request.Options) FieldUtils.getPrivateField(Feign.Builder.class, builder, "options");
        Assert.assertNotNull(options);
        System.out.println(options.connectTimeoutMillis() + ":" + options.readTimeoutMillis());
    }