public final UnaryCallable<UpdateChannelRequest, Operation> updateChannelCallable() {
    return stub.updateChannelCallable();
  }
Updates the specified channel.

<p>Sample code:

<pre>{@code
// This snippet has been automatically generated and should be regarded as a code template only.
// It will require modifications to work:
// - It may require correct/in-range values for request initialization.
// - It may require specifying regional endpoints when creating the service client as shown in
// https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
try (LivestreamServiceClient livestreamServiceClient = LivestreamServiceClient.create()) {
  UpdateChannelRequest request =
      UpdateChannelRequest.newBuilder()
          .setUpdateMask(FieldMask.newBuilder().build())
          .setChannel(Channel.newBuilder().build())
          .setRequestId("requestId693933066")
          .build();
  ApiFuture<Operation> future =
      livestreamServiceClient.updateChannelCallable().futureCall(request);
  // Do something.
  Operation response = future.get();
}
}</pre>
java-video-live-stream/google-cloud-live-stream/src/main/java/com/google/cloud/video/livestream/v1/LivestreamServiceClient.java