{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"let"}]}
            let parent_args = tcx.mk_args(args.as_coroutine_closure().parent_args());
            let _ = write!(s, "u{}{}", name.len(), name);
            s.push_str(&encode_args(tcx, parent_args, *def_id, false, dict, options));