public static NacosAsyncRestTemplate getNacosAsyncRestTemplate(Logger logger) {
        return getNacosAsyncRestTemplate(new DefaultHttpClientFactory(logger));
    }
@Test
    void testGetNacosAsyncRestTemplateForNullFactory() {
        assertThrows(NullPointerException.class, () -> {
            HttpClientBeanHolder.getNacosAsyncRestTemplate((HttpClientFactory) null);
        });
    }