public String greet(String name) {
        HelloRequest request = HelloRequest.newBuilder().setName(name).build();
        HelloReply response = blockingStub.sayHello(request);

        logger.info("Greeting: {}" + response.getMessage());
        return response.getMessage();
    }
Construct client connecting to HelloWorld server at {@code host:port}.
agent-module/plugins-it/google-grpc-it/google-grpc-1-42-it/src/test/java/com/navercorp/pinpoint/it/plugin/grpc/HelloWorldSimpleClient.java