Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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// Protocol Buffers - Google's data interchange format
// Copyright 2016 Google Inc. 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 objc.protobuf.tests.chain;
import "objectivec/Tests/unittest.proto";
import "objectivec/Tests/unittest_extension_chain_b.proto";
import "objectivec/Tests/unittest_extension_chain_c.proto";
import "objectivec/Tests/unittest_extension_chain_d.proto";
option objc_class_prefix = "Chain";
// The Root for this file should end up adding the local extension and merging
// in the extensions from D's Root (unittest and C will come via D's).
message AMessage {
optional BMessage b = 1;
optional CMessage c = 2;
optional DMessage d = 3;
}
extend objc.protobuf.tests.TestAllExtensions {
optional int32 chain_a_extension = 10001;
}