@abc.abstractmethod<EOL><INDENT>def get_schedule(self):<DEDENT>
return<EOL>
Gets the schedule.

        :return: the schedule
        :rtype: ``osid.calendaring.Schedule``
        :raise: ``IllegalState`` -- ``is_effective_by_schedule()`` is ``false``
        :raise: ``OperationFailed`` -- unable to complete request

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