getExpireDate method
Implementation
DateTime getExpireDate(String line) {
String cleanedLine = line.replaceAll(RegExp("[^0-9]"), "");
_handleException(cleanedLine);
final size = cleanedLine.length - 1;
final countDays = int.parse(cleanedLine.substring(size - 13, size - 9));
return DateTime(1997, 10, 07).add(
Duration(days: countDays),
);
}