onDeactivate method
Called when the IDE is shutting down this plugin.
Implementation
@override
Future<void> onDeactivate() async {
if (!_activated) return;
_configListener?.dispose();
for (final subscription in _subscriptions) {
await subscription.cancel();
}
await _dashboard.dispose();
await _music.dispose();
log('M.U.S.E. deactivated');
}