{"ast_node_type":"variable","tokens":[{"end":45,"kind":"keyword","start":0,"text":"if"}]}
            if let Some(reason) = find_attr!(
        fn is_def_must_use(cx: &LateContext<'_>, def_id: DefId, span: Span) -> Option<MustUsePath> {
                cx.tcx.get_all_attrs(def_id),