subtract method
Substracts time to the current date
Implementation
Moment subtract({
int years: 0,
int quarters: 0,
int months: 0,
int weeks: 0,
int days: 0,
int hours: 0,
int minutes: 0,
int seconds: 0,
int milliseconds: 0,
int microseconds: 0,
}) {
var dateTime = DateTime(
_date.year - years,
_date.month - months - quarters * monthPerQuarter,
_date.day - days - weeks * DateTime.daysPerWeek,
_date.hour - hours,
_date.minute - minutes,
_date.second - seconds,
_date.millisecond - milliseconds,
_date.microsecond - microseconds,
);
return Moment.fromDateTime(dateTime);
}