sample.proto

service Sample {
  rpc SampleAPI(Request) returns (Response) {
    option (google.api.http) = {
      get : "/sample"
    };
    option (grpc.gateway.protoc_gen_swagger.options.openapiv2_operation) = {
      summary : "サンプル"
      responses : {
        key : "500";
        value : {
          description : "Internal Server Error";
          schema : {
            json_schema : {
              ref : ".Errors.InternalErrorResponse";
            }
          }
        }
      }
    };
  }
}