{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
        let span = bounds.iter().fold(span_start, |span_accum, bound| {
        let span_start = colon_span.unwrap_or_else(|| param_span.shrink_to_hi());
            match bound.span().find_ancestor_inside(parent_span) {