@abc.abstractmethod<EOL><INDENT>def changed_commitments(self, notification_id, commitment_ids):<DEDENT>
pass<EOL>
The callback for notification of updated commitments.

        :param notification_id: the notification ``Id``
        :type notification_id: ``osid.id.Id``
        :param commitment_ids: the ``Id`` of the updated ``Commitments``
        :type commitment_ids: ``osid.id.IdList``


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