@utilities.arguments_not_none<EOL><INDENT>def sequence_gradebook_columns(self, gradebook_column_ids):<DEDENT>
raise errors.Unimplemented()<EOL>
Resequences the gradebook columns.

        arg:    gradebook_column_ids (osid.id.IdList): the ``Ids`` of
                the ``GradebookColumns``
        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.*