| // Copyright 2020 The Pigweed Authors | 
 | // | 
 | // Licensed under the Apache License, Version 2.0 (the "License"); you may not | 
 | // use this file except in compliance with the License. You may obtain a copy of | 
 | // the License at | 
 | // | 
 | //     https://www.apache.org/licenses/LICENSE-2.0 | 
 | // | 
 | // Unless required by applicable law or agreed to in writing, software | 
 | // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | 
 | // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the | 
 | // License for the specific language governing permissions and limitations under | 
 | // the License. | 
 |  | 
 | syntax = "proto3"; | 
 |  | 
 | package pw.protobuf; | 
 |  | 
 | message Empty {} |