如何在Java中使用grpc channelz

<dependency>
    <groupId>io.grpc</groupId>
    <artifactId>grpc-netty-shaded</artifactId>
    <version>1.41.0</version>
</dependency>
<dependency>
    <groupId>io.grpc</groupId>
    <artifactId>grpc-services</artifactId>
    <version>1.41.0</version>
</dependency>

ManagedChannel channel = ManagedChannelBuilder.forAddress("localhost", 50051)
        .usePlaintext()
        .enableChannelz(true)
        .build();

Channelz channelz = Channelz.getChannelz();
ChannelStats channelStats = channelz.getChannel(channel);

System.out.println("Channel ID: " + channelStats.getChannelId());
System.out.println("Target: " + channelStats.getTarget());
System.out.println("State: " + channelStats.getState());
System.out.println("Calls Succeeded: " + channelStats.getCallsSucceeded());
System.out.println("Calls Failed: " + channelStats.getCallsFailed());