@utilities.arguments_not_none<EOL><INDENT>def is_assessment_over(self, assessment_taken_id):<DEDENT>
return self._get_assessment_taken(assessment_taken_id).has_ended()<EOL>
Tests if this assessment is over.

        An assessment is over if ``finished_assessment()`` is invoked or
        the designated finish time has expired.

        arg:    assessment_taken_id (osid.id.Id): ``Id`` of the
                ``AssessmentTaken``
        return: (boolean) - ``true`` if this assessment is over,
                ``false`` otherwise
        raise:  NotFound - ``assessment_taken_id`` is not found
        raise:  NullArgument - ``assessment_taken_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure occurred
        *compliance: mandatory -- This method must be implemented.*