如何在grpc java服务器中设置头部响应

<dependencies>
    <dependency>
        <groupId>io.grpc</groupId>
        <artifactId>grpc-netty</artifactId>
        <version>1.41.0</version>
    </dependency>
    <dependency>
        <groupId>io.grpc</groupId>
        <artifactId>grpc-protobuf</artifactId>
        <version>1.41.0</version>
    </dependency>
    <dependency>
        <groupId>io.grpc</groupId>
        <artifactId>grpc-stub</artifactId>
        <version>1.41.0</version>
    </dependency>
</dependencies>

public interface MyService {
    void myMethod(MyRequest request, StreamObserver<MyResponse> responseObserver);
}

public class MyServiceImpl extends MyServiceGrpc.MyServiceImplBase {
    @Override
    public void myMethod(MyRequest request, StreamObserver<MyResponse> responseObserver) {
        // 设置头部响应
        Metadata headers = new Metadata();
        headers.put(Metadata.Key.of("Custom-Header", Metadata.ASCII_STRING_MARSHALLER), "Header Value");
        responseObserver.setHeader(headers);

        // 处理请求并发送响应
        // ...
    }
}

public class MyServer {
    private Server server;

    private void start() throws IOException {
        int port = 50051;
        server = ServerBuilder.forPort(port)
                .addService(new MyServiceImpl())
                .build()
                .start();

        System.out.println("Server started on port " + port);

        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            System.out.println("Shutting down server");
            MyServer.this.stop();
        }));
    }

    private void stop() {
        if (server != null) {
            server.shutdown();
        }
    }

    private void blockUntilShutdown() throws InterruptedException {
        if (server != null) {
            server.awaitTermination();
        }
    }

    public static void main(String[] args) throws IOException, InterruptedException {
        MyServer myServer = new MyServer();
        myServer.start();
        myServer.blockUntilShutdown();
    }
}