getConnectedDevice method
Implementation
@override
getConnectedDevice() async {
  final res = await methodChannel
      .invokeMethod<List<BluetoothDeviceModel>?>('getConnectedDevice');
  return res;
}@override
getConnectedDevice() async {
  final res = await methodChannel
      .invokeMethod<List<BluetoothDeviceModel>?>('getConnectedDevice');
  return res;
}