@abc.abstractmethod<EOL><INDENT>def get_superseding_event_ids_by_calendar(self, calendar_id):<DEDENT>
return<EOL>
Gets the list of ``SupersedingEvent``  ``Ids`` associated with a ``Calendar``.

        :param calendar_id: ``Id`` of the ``Calendar``
        :type calendar_id: ``osid.id.Id``
        :return: list of related superseding event ``Ids``
        :rtype: ``osid.id.IdList``
        :raise: ``NotFound`` -- ``calendar_id`` is not found
        :raise: ``NullArgument`` -- ``calendar_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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