{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
        let span = span.with_lo(span.lo() + BytePos(1)).shrink_to_lo();
        // shrink the span to just after the `&` in `&variable`
        Some(AmpMutSugg { has_sugg: true, span, suggestion: "mut ".to_owned(), additional: None })