@utilities.arguments_not_none<EOL><INDENT>def search_among_objectives(self, objective_ids):<DEDENT>
self._id_list = objective_ids<EOL>
Execute this search among the given list of objectives.

        arg:    objective_ids (osid.id.IdList): list of objectives
        raise:  NullArgument - ``objective_ids`` is ``null``
        *compliance: mandatory -- This method must be implemented.*