How to add services to gRPC server at startup via Spring Boot?

Question

Java

I started to study GRPC framework based on examples from the Internet.
There was a question about "configuring" the GRPC server when it starts from Spring Boot via the @GRpcService annotation.
More precisely, there is the main Spring Boot class

@SpringBootApplication
public class SpringGrpcApplication {
    public static void main(String args[]) {
        SpringApplication.run(SpringGrpcApplication.class, args);
    }
}

and there is a GRPC service Java class

@GRpcService
public class HelloWorldServiceImpl  extends HelloWorldServiceGrpc.HelloWorldServiceImplBase {
...
@Override
    public void sayHello(Person request, StreamObserver<Greeting> responseObserver) {
...
 responseObserver.onCompleted();
    }
}

When SpringGrpcApplication is launched, a grpc server with a deployed HelloWorldServiceImpl service is automatically created
.
It is clear how to do this if you start the server directly like
Server server = ServerBuilder.forPort(6789).addService(ProtoReflectionService.newInstance()).addService(new HelloWorldServiceImpl()).build();
I would be grateful for any ideas and tips.