@abc.abstractmethod<EOL><INDENT>def deleted_time_periods(self, notification_id, time_period_ids):<DEDENT>
pass<EOL>
The callback for notification of deleted time periods.

        :param notification_id: the notification ``Id``
        :type notification_id: ``osid.id.Id``
        :param time_period_ids: the ``Id`` of the deleted ``TimePeriods``
        :type time_period_ids: ``osid.id.IdList``


        *compliance: mandatory -- This method must be implemented.*