@abc.abstractmethod<EOL><INDENT>def register_for_deleted_objective(self, objective_id):<DEDENT>
pass<EOL>
Registers for notification of a deleted objective.

        ``ObjectiveReceiver.changedObjectives()`` is invoked when the
        specified objective is removed from this objective bank.

        :param objective_id: the ``Id`` of the ``Objective`` to monitor
        :type objective_id: ``osid.id.Id``
        :raise: ``NullArgument`` -- ``objectiveid is null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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