subtract method
Implementation
EDateTime subtract({
int year = 0,
int month = 0,
int day = 0,
int hour = 0,
int minute = 0,
int second = 0,
int millisecond = 0,
int microsecond = 0,
}) {
_date = DateTime(
_date.year - year,
_date.month - month,
_date.day - day,
_date.hour - hour,
_date.minute - minute,
_date.second - second,
_date.millisecond - millisecond,
_date.microsecond - microsecond);
return EDateTime.fromDateTime(_date);
}