def formfield_for_dbfield(self, db_field, **kwargs):
        if db_field.name == self.sortable:
            kwargs['widget'] = deepcopy(SortableListForm.Meta.widgets['order'])
            kwargs['widget'].attrs['class'] += ' suit-sortable-stacked'
            kwargs['widget'].attrs['rowclass'] = ' suit-sortable-stacked-row'
        return super(SortableStackedInlineBase, self).formfield_for_dbfield(db_field, **kwargs)