@abc.abstractmethod<EOL><INDENT>def new_ancestor_repository(self, repository_id, ancestor_id):<DEDENT>
pass<EOL>
The callback for notifications of new repository ancestors.

        :param repository_id: the ``Id`` of the ``Repository``
        :type repository_id: ``osid.id.Id``
        :param ancestor_id: the ``Id`` of the new ``Repository`` ancestor
        :type ancestor_id: ``osid.id.Id``


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