private Optional<Instance> selectCurrentInstance(List<Instance> instances) {
		return instances.stream()
				.filter(instance -> properties.getIp().equals(instance.getIp())
						&& properties.getPort() == instance.getPort())
				.findFirst();
	}
@author xiaojing
@author yuhuangbin
@author pengfei.lu
@author ruansheng
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/discovery/NacosWatch.java