{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"|items,"}]}
        |items, first_span| AttributeKind::AllowConstFnUnstable(items, first_span);
    const CONVERT: ConvertFn<Self::Item> =
    const TEMPLATE: AttributeTemplate = template!(Word, List: "feat1, feat2, ...");