apollo-configservice/src/main/java/com/ctrip/framework/apollo/metaservice/service/SpringCloudInnerDiscoveryService.java/SpringCloudInnerDiscoveryService/SpringCloudInnerDiscoveryService
class SpringCloudInnerDiscoveryService:    public SpringCloudInnerDiscoveryService(DiscoveryClient discoveryClient) {
        this.discoveryClient = discoveryClient;
    }