@abc.abstractmethod<EOL><INDENT>def get_ancestor_configuration_query(self):<DEDENT>
return<EOL>
Gets the query interface for a configuration.

        :return: the configuration query
        :rtype: ``osid.configuration.ConfigurationQuery``
        :raise: ``Unimplemented`` -- ``supports_ancestor_configuration_query()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_ancestor_configuration_query()`` is ``true``.*