@utilities.arguments_not_none<EOL><INDENT>def order_relationship_results(self, relationship_search_order):<DEDENT>
raise errors.Unimplemented()<EOL>
Specify an ordering to the search results.

        arg:    relationship_search_order
                (osid.relationship.RelationshipSearchOrder):
                relationship search order
        raise:  NullArgument - ``relationship_search_order`` is ``null``
        raise:  Unsupported - ``relationship_search_order`` is not of
                this service
        *compliance: mandatory -- This method must be implemented.*