@abc.abstractmethod<EOL><INDENT>def get_superseding_events(self):<DEDENT>
return<EOL>
Gets the superseding events.

        A superseding event is one that replaces another in a series.

        :return: list of superseding events
        :rtype: ``osid.calendaring.SupersedingEventList``
        :raise: ``OperationFailed`` -- unable to complete request

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