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

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

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