@utilities.arguments_not_none<EOL><INDENT>def move_gradebook_column(self, front_gradebook_column_id, back_gradebook_column_id):<DEDENT>
raise errors.Unimplemented()<EOL>
Moves a gradebook column in front of another.

        arg:    front_gradebook_column_id (osid.id.Id): the ``Id`` of a
                ``GradebookColumn``
        arg:    back_gradebook_column_id (osid.id.Id): the ``Id`` of a
                ``GradebookColumn``
        raise:  NotFound - ``front_gradebook_column_id or
                back_gradebook_column_id`` is not found
        raise:  NullArgument - ``front_gradebook_column_id or
                back_gradebook_column_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*