def get_relationship_rules_proxy_manager(self):
if proxy is None:<EOL><INDENT>raise NullArgument()<EOL><DEDENT>raise Unimplemented()<EOL>
Gets the relationship rules proxy manager.

        return: (osid.relationship.rules.RelationshipRulesProxyManager)
                - a ``RelationshipRulesProxyManager``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_relationship_rules()`` is
                ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_relationship_rules()`` is ``true``.*