scanDocument method
Implementation
@override
Future<bool> scanDocument(DocumentScannerConfiguration scanConfig) {
JsonWriter jsonWriter = JsonWriter();
var dataToPass = jsonWriter.documentScannerConfigurationToJson(scanConfig);
var sJson = jsonEncode(dataToPass);
return methodChannel.invokeMethod<bool>('scanDocument',
{'scanConfig': sJson}).then<bool>((bool? value) => value ?? false);
}