newMessageSetExtensionWriter  732 third_party/protobuf/java/src/main/java/com/google/protobuf/GeneratedMessage.java     protected ExtensionWriter newMessageSetExtensionWriter() {
newMessageSetExtensionWriter  290 third_party/protobuf/java/src/main/java/com/google/protobuf/GeneratedMessageLite.java     protected ExtensionWriter newMessageSetExtensionWriter() {