|  | // Protocol Buffers - Google's data interchange format | 
|  | // Copyright 2023 Google LLC.  All rights reserved. | 
|  | // | 
|  | // Use of this source code is governed by a BSD-style | 
|  | // license that can be found in the LICENSE file or at | 
|  | // https://developers.google.com/open-source/licenses/bsd | 
|  |  | 
|  | syntax = "proto2"; | 
|  |  | 
|  | package upb_util_test; | 
|  |  | 
|  | message EmptyMessage {} | 
|  |  | 
|  | message HasRequiredField { | 
|  | required int32 required_int32 = 1; | 
|  | } | 
|  |  | 
|  | message TestRequiredFields { | 
|  | required EmptyMessage required_message = 1; | 
|  | optional TestRequiredFields optional_message = 2; | 
|  | repeated HasRequiredField repeated_message = 3; | 
|  | map<int32, HasRequiredField> map_int32_message = 4; | 
|  | map<int64, HasRequiredField> map_int64_message = 5; | 
|  | map<uint32, HasRequiredField> map_uint32_message = 6; | 
|  | map<uint64, HasRequiredField> map_uint64_message = 7; | 
|  | map<bool, HasRequiredField> map_bool_message = 8; | 
|  | map<string, HasRequiredField> map_string_message = 9; | 
|  | } |