public List<ProviderInfo> currentProviders() {
        return currentData.getValue().stream()
                .map(HealthService::getService)
                .map(service -> ProviderHelper.toProviderInfo(convertInstanceToUrl(service.getAddress(), service.getPort(), service.getMeta())))
                .collect(Collectors.toList());
    }
Observe the providers from consul and notify the consumers

@author <a href=mailto:scienjus@gmail.com>ScienJus</a>
registry/registry-consul/src/main/java/com/alipay/sofa/rpc/registry/consul/HealthServiceInformer.java