dubbo:
  registries:
    "demoZK":
      protocol: zookeeper
      timeout: 3s
      address: 127.0.0.1:2181
  consumer:
    registry-ids:
      - demoZK
    references:
      UserProvider:
        protocol: tri
        serialization: msgpack
        interface: com.apache.dubbo.sample.basic.IGreeter # must be compatible with grpc or dubbo-java