formatTimeInMinuteSecond method
Implementation
String formatTimeInMinuteSecond() {
int timeInSecond = int.tryParse(this) ?? 0;
int sec = timeInSecond % 60;
int min = (timeInSecond / 60).floor();
String minute = min.toString().length <= 1 ? "0$min" : "$min";
String second = sec.toString().length <= 1 ? "0$sec" : "$sec";
return "$minute : $second";
}