how to stop receive event_callback

[bmiyuan]

I just create a nats client , the client can subscribe events and works fine, if I stop the nats.exe running, and also drop this nats client, why I still can receive this callback of event Event::ClientError which I register with .event_callback(). is there any way I can stop this callback? such as client.close() or anything else can stop receive this callback?
the create client params as below:
...... let options = ConnectOptions::default() .retry_on_initial_connect() .event_callback(callback); let client = options.connect(ip).await.unwrap(); ......

[Jarema]

Hey,

I assume you have a leftover clone of the client somewhere.
We considering adding close() to make it easier.

[caspervonb]

As @Jarema eluded to, the callback is shared across all clones of Client.
Once all clients are dropped the dispatching task will exit.

[barafael]

@bmiyuan can this issue be closed?