@abc.abstractmethod<EOL><INDENT>def get_assessment_parts_for_assessment(self, assessment_id):<DEDENT>
return<EOL>
Gets an ``AssessmentPart`` for the given assessment.

        :param assessment_id: an assessment ``Id``
        :type assessment_id: ``osid.id.Id``
        :return: the returned ``AssessmentPart`` list
        :rtype: ``osid.assessment.authoring.AssessmentPartList``
        :raise: ``NullArgument`` -- ``assessment_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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