@Override
	public HttpRequest transformRequest(HttpRequest request, ServiceInstance instance) {
		if (instance != null) {
			MetadataContextHolder.get().setLoadbalancer(LOAD_BALANCER_SERVICE_INSTANCE, instance);
		}
		return request;
	}
@Test
	public void test() throws Throwable {
		transformer.transformRequest(clientRequest, serviceInstance);
		assertThat(MetadataContextHolder.get().getLoadbalancerMetadata().get(LOAD_BALANCER_SERVICE_INSTANCE)).isEqualTo(serviceInstance);
	}