ensureExtensionsIsMutable  886 third_party/protobuf/java/src/main/java/com/google/protobuf/GeneratedMessage.java     private void ensureExtensionsIsMutable() {
ensureExtensionsIsMutable  324 third_party/protobuf/java/src/main/java/com/google/protobuf/GeneratedMessageLite.java     private void ensureExtensionsIsMutable() {