toPersianDateTime method
Implementation
String toPersianDateTime() {
final j = shmsi.Jalali.fromDateTime(this);
final dateStr =
'${j.year.toString().padLeft(4, '0')}/${j.month.toString().padLeft(2, '0')}/${j.day.toString().padLeft(2, '0')}';
final timeStr =
'${hour.toString().padLeft(2, '0')}:${minute.toString().padLeft(2, '0')}:${second.toString().padLeft(2, '0')}';
return '$dateStr $timeStr';
}