getSchedule method
An ordered list of timestamp generated by this trigger for a
given period. This is mainly used for persistently scheduling
a list of AppTasks from triggers that implement the Schedulable
interface.
Implementation
@override
List<DateTime> getSchedule(DateTime from, DateTime to, [int? max]) =>
(configuration!.schedule.isAfter(from) &&
configuration!.schedule.isBefore(to))
? [configuration!.schedule]
: [];