ago method
Returns the point in time that's given amount of time ago.
The amount of time is the sum of the individual parts.
Implementation
DateTime ago(
{int days = 0,
int hours = 0,
int minutes = 0,
int seconds = 0,
int milliseconds = 0,
int microseconds = 0}) =>
agoBy(Duration(
days: days,
hours: hours,
minutes: minutes,
seconds: seconds,
milliseconds: milliseconds,
microseconds: microseconds));