def get_learning_objective_query(self):
raise errors.Unimplemented()<EOL>
Gets the query for a learning objective.

        Multiple retrievals produce a nested ``OR`` term.

        return: (osid.learning.ObjectiveQuery) - the learning objective
                query
        raise:  Unimplemented - ``supports_learning_objective_query()``
                is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_learning_objective_query()`` is ``true``.*