@abc.abstractmethod<EOL><INDENT>def get_vault_search_order(self):<DEDENT>
return<EOL>
Gets a vault search order.

        The ``VaultSearchOrder`` is supplied to a ``VaultSearch`` to
        specify the ordering of results.

        :return: the vault search order
        :rtype: ``osid.authorization.VaultSearchOrder``


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