hasPermission method
Implementation
Future<BluetoothPeripheralState> hasPermission() async {
if (!Platform.isAndroid) return BluetoothPeripheralState.unknown;
final response = await _methodChannel.invokeMethod<int>('hasPermission');
return response == null
? BluetoothPeripheralState.unknown
: BluetoothPeripheralState.values[response];
}