{"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"tscx.marker.mark_span(&mut"}]}
            tscx.marker.mark_span(&mut sp);
        MatchedSingle(ParseNtResult::Lifetime(ident, is_raw)) => {
            with_metavar_spans(|mspans| mspans.insert(ident.span, sp));