newExtensionWriter  729 third_party/protobuf/java/src/main/java/com/google/protobuf/GeneratedMessage.java     protected ExtensionWriter newExtensionWriter() {
newExtensionWriter  287 third_party/protobuf/java/src/main/java/com/google/protobuf/GeneratedMessageLite.java     protected ExtensionWriter newExtensionWriter() {