private static void emitNewInstanceCallbacks(ClassEmitter ce) {
    CodeEmitter e = ce.begin_method(Constants.ACC_PUBLIC, NEW_INSTANCE, null);
    e.load_arg(0);
    e.invoke_static_this(SET_THREAD_CALLBACKS);
    emitCommonNewInstance(e);
  }
private static void emitNewInstanceCallbacks(ClassEmitter ce)