@abc.abstractmethod<EOL><INDENT>def match_ancestor_objective_id(self, objective_id, match):<DEDENT>
pass<EOL>
Sets the objective ``Id`` for this query to match objectives that have the specified objective as an ancestor.

        :param objective_id: an objective ``Id``
        :type objective_id: ``osid.id.Id``
        :param match: ``true`` for a positive match, ``false`` for a negative match
        :type match: ``boolean``
        :raise: ``NullArgument`` -- ``objective_id`` is ``null``

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