@abc.abstractmethod<EOL><INDENT>def sequence_gradebook_columns(self, gradebook_column_ids):<DEDENT>
pass<EOL>
Resequences the gradebook columns.

        :param gradebook_column_ids: the ``Ids`` of the ``GradebookColumns``
        :type gradebook_column_ids: ``osid.id.IdList``
        :raise: ``NullArgument`` -- ``gradebook_column_id_list`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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