close method
Closes the hid device
Implementation
Future<void> close() async {
var responsePort = ReceivePort();
commandPort.send(USBIsolateCommand(
responsePort.sendPort, USBDeviceCommand.close, null, null));
var resp = await responsePort.first as USBIsolateResponse;
if (resp.status != USBDeviceStatus.ok) {
throw Exception("Error closing device: ${resp.errorMsg}");
}
}