@abc.abstractmethod<EOL><INDENT>def search_among_superseding_events(self, superseding_event_ids):<DEDENT>
pass<EOL>
Execute this search among the given list of superseding events.

        :param superseding_event_ids: list of superseding events
        :type superseding_event_ids: ``osid.id.IdList``
        :raise: ``NullArgument`` -- ``superseding_event_ids`` is ``null``

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