{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
        let after_open = expr.span.lo() + rustc_span::BytePos(1);
        let is_wrapped = expr_snippet.starts_with('(') && expr_snippet.ends_with(')');
        let before_close = expr.span.hi() - rustc_span::BytePos(1);