@abc.abstractmethod<EOL><INDENT>def get_superseding_event_admin_session(self, proxy):<DEDENT>
return<EOL>
Gets the ``OsidSession`` associated with the superseding event administration service.

        :param proxy: a proxy
        :type proxy: ``osid.proxy.Proxy``
        :return: a ``SupersedingEventAdminSession``
        :rtype: ``osid.calendaring.SupersedingEventAdminSession``
        :raise: ``NullArgument`` -- ``proxy`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_event_admin()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_superseding_event_admin()`` is ``true``.*