1// Protocol Buffers - Google's data interchange format
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29
30syntax = "proto2";
31
32package protobuf_unittest;
33
34import "google/protobuf/unittest.proto";
35
36import "unittest_extension_chain_b.proto";
37import "unittest_extension_chain_c.proto";
38import "unittest_extension_chain_d.proto";
39
40// The Root for this file should end up adding the local extension and merging
41// in the extensions from D's Root (unittest and C will come via D's).
42
43message ChainAMessage {
44  optional ChainBMessage b = 1;
45  optional ChainCMessage c = 2;
46  optional ChainDMessage d = 3;
47}
48
49extend TestAllExtensions {
50  optional int32 chain_a_extension = 10001;
51}
52