@abc.abstractmethod<EOL><INDENT>def register_for_deleted_repository_descendants(self, repository_id):<DEDENT>
pass<EOL>
Registers for notification if a descendant is removed from fthe specified repository in the repository hierarchy.

        ``RepositoryReceiver.deletedRepositoryDescednant()`` is invoked
        when the specified repository experiences a removal of one of
        its descdendents.

        :param repository_id: the ``Id`` of the repository to monitor
        :type repository_id: ``osid.id.Id``
        :raise: ``NullArgument`` -- ``repository_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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