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

        The ``RelationshipSearchOrder`` is supplied to a
        ``RelationshipSearch`` to specify the ordering of results.

        :return: the relationship search order
        :rtype: ``osid.relationship.RelationshipSearchOrder``


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