birthDateCode method
Implementation
String birthDateCode() {
String year = '${this.birthDate.year.toString()[2]}${this.birthDate.year.toString()[3]}';
String month = MONTH_CODES[this.birthDate.month - 1];
int dayInt = this.birthDate.day;
if (gender == CodiceFiscaleGender.F) {
dayInt += 40;
}
String day = '0$dayInt';
day = day.substring(day.length - 2, day.length);
return '$year$month$day';
}