toJalaliDateTime method
ISO date text → "1403/01/01 14:05" in Jalali (now when null).
Implementation
String toJalaliDateTime() {
final DateTime dateTime = DateTime.parse(this ?? DateTime.now().toString());
return "${UJalali.fromDateTime(dateTime).formatCompactDate()} ${dateTime.hour.twoDigits}:${dateTime.minute.twoDigits}";
}