register method

@override Future<String?> register()

Implementation

@override
Future<String?> register() async {
  _completer = Completer();
  callback.setMethodCallHandler((handle) async {
    if (handle.method == 'completed') {
      _completer.complete(handle.arguments as String);
    }
  });
  await methodChannel.invokeMethod('register');

  return await _completer.future;
}