{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
                            let args = tcx.lift(args).unwrap();
                        let name = if tcx.sess.opts.unstable_opts.span_free_formats {
                            format!("{{closure@{}}}", tcx.def_path_str_with_args(def_id, args),)