onTap property Null safety

CalendarTapCallback? onTap

Called whenever the SfCalendar elements tapped on view.

The tapped date, appointments, and element details when the tap action performed on element available in the CalendarTapDetails.

see also: CalendarTapDetails. CalendarElement

return Container(
     child: SfCalendar(
       view: CalendarView.week,
       onTap: (CalendarTapDetails details){
         DateTime date = details.date!;
         dynamic appointments = details.appointments;
         CalendarElement view = details.targetElement;


final CalendarTapCallback? onTap;