Like event listeners, you can assign a stream listener to a listener variable. A stream listener exists until one of the following happens:
The monitor instance that contains the stream listener is terminated.
The stream or streams the listener refers to are terminated.
If you do not want to wait for one of the above to occur, you can stop a stream listener by calling the quit() method on a listener variable that refers to it. Note that in many cases this will also terminate the stream that is feeding the stream listener. See Stream network lifetime.
The monitor instance that contains the stream listener is terminated.