{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"GenericArgKind::Lifetime(r)"}]}
            GenericArgKind::Lifetime(r) => Some(typeck.to_region_vid(r)),
        .filter_map(|(_, arg)| match arg.kind() {
            GenericArgKind::Type(_) | GenericArgKind::Const(_) => None,