scan method
Implementation
static Future<List<String>> scan({
bool isBeep = true,
bool isContinuous = false,
int continuousInterval = 1000,
}) async {
final List barcodes = await _channel.invokeMethod(
'scan',
Map()
..['isBeep'] = isBeep
..['isContinuous'] = isContinuous
..['continuousInterval'] = continuousInterval);
return barcodes.map((it) => it as String).toList();
}