stop method
void
stop()
Implementation
void stop() {
if (_discoverySearchTimer != null) {
_discoverySearchTimer!.cancel();
_discoverySearchTimer = null;
}
for (var socket in _sockets) {
socket.close();
}
if (!_clientController.isClosed) {
_clientController.close();
_clientController = StreamController<DiscoveredClient>.broadcast();
}
}