@abc.abstractmethod<EOL><INDENT>def alias_superseding_event(self, superseding_event_id, alias_id):<DEDENT>
pass<EOL>
Adds an ``Id`` to a ``SupersedingEvent`` for the purpose of creating compatibility.

        The primary ``Id`` of the ``SupersedingEvent`` is determined by
        the provider. The new ``Id`` performs as an alias to the primary
        ``Id``. If the alias is a pointer to another superseding event,
        it is reassigned to the given superseding event ``Id``.

        :param superseding_event_id: the ``Id`` of a ``SupersedingEvent``
        :type superseding_event_id: ``osid.id.Id``
        :param alias_id: the alias ``Id``
        :type alias_id: ``osid.id.Id``
        :raise: ``AlreadyExists`` -- ``alias_id`` is already assigned
        :raise: ``NotFound`` -- ``superseding_event_id`` not found
        :raise: ``NullArgument`` -- ``superseding_event_id`` or ``alias_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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