{"ast_node_type":"variable","tokens":[{"end":55,"kind":"keyword","start":0,"text":"let"}]}
    let union_ty_and_layout = cx.layout_of(union_type);
    let containing_scope = get_namespace_for_item(cx, union_def_id);
    let type_name = compute_debuginfo_type_name(cx.tcx, union_type, false);