{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"(&[sym::rustc_const_stable],"}]}
        (&[sym::rustc_const_stable], template!(List: r#"feature = "name""#), |this, cx, args| {
    const ATTRIBUTES: AcceptMapping<Self, S> = &[
            reject_outside_std!(cx);