shutdown method

@override Future<String?> shutdown()

Implementation

@override
Future<String?> shutdown() async {
  // Stop Dart-side stream listeners before shutting down native state.
  _beforeSendCallback = null;
  stopListening();
  _tracesExporterCallback = null;
  _stopTracesExporterListening();
  final version = await methodChannel.invokeMethod<String>('shutdown');
  return version;
}