@abc.abstractmethod<EOL><INDENT>def update_assessment_offered(self, assessment_offered_form):<DEDENT>
pass<EOL>
Updates an existing assessment offered.

        :param assessment_offered_form: the form containing the elements to be updated
        :type assessment_offered_form: ``osid.assessment.AssessmentOfferedForm``
        :raise: ``IllegalState`` -- ``assessment_offrered_form`` already used in an update transaction
        :raise: ``InvalidArgument`` -- the form contains an invalid value
        :raise: ``NullArgument`` -- ``assessment_offered_form`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred
        :raise: ``Unsupported`` -- ``assessment_form`` did not originate from ``get_assessment_form_for_update()``

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