{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
    let type_name = compute_debuginfo_type_name(cx.tcx, union_type, false);
    let union_ty_and_layout = cx.layout_of(union_type);
    let def_location = if cx.sess().opts.unstable_opts.debug_info_type_line_numbers {