@abc.abstractmethod<EOL><INDENT>def register_for_new_gradebook_columns(self):<DEDENT>
pass<EOL>
Register for notifications of new gradebook columns.

        ``GradebookColumnReceiver.newGradebookColumns()`` is invoked
        when a new column is created.

        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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