testSerializeMessageSetWithFlag  333 third_party/protobuf/java/src/test/java/com/google/protobuf/WireFormatTest.java     testSerializeMessageSetWithFlag(true);
testSerializeMessageSetWithFlag  337 third_party/protobuf/java/src/test/java/com/google/protobuf/WireFormatTest.java     testSerializeMessageSetWithFlag(false);