getId method

Maps the custom appointments id to the Appointment.

Allows to set the custom appointments corresponding property to the Appointment's id property.

Note: It is applicable only when the custom appointments set to the appointments.

See also:

• Appointment.id, which holds an unique identification number for the appointment in the calendar.
• getRecurrenceRule, which used to map the custom appointment's Appointment.recurrenceRule property to the Appointment.

 @override
 DateTime getId(int index) {
   return appointments[index].id;
 }