@abc.abstractmethod<EOL><INDENT>def search_among_assessments(self, assessment_ids):<DEDENT>
pass<EOL>
Execute this search among the given list of assessments.

        :param assessment_ids: list of assessments
        :type assessment_ids: ``osid.id.IdList``
        :raise: ``NullArgument`` -- ``assessment_ids`` is ``null``

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