onDone method
Replaces the done event handler of this subscription.
The handleDone
function is called when the stream closes.
The value may be null
, in which case no function is called.
This method replaces the current handler set by the invocation of Stream.listen, by calling asFuture, or by a previous call to onDone.
Implementation
@override
void onDone(void Function()? handleDone) => _doneHandler = handleDone;