onMessage never triggered about flutter-unity HOT 2 OPEN

  @Keep
  public static void onMessage(String data) {
    Log.d(String.valueOf(FlutterUnityPlugin.class), "onMessage: " + data);
    try {
      JSONObject jsonObject = new JSONObject(data);
      int messageId = jsonObject.getInt("id");
      String messageData = jsonObject.getString("data");
      for (FlutterUnityView view : FlutterUnityPlugin.views) {
        // --- CHECK WAS REMOVED HERE ---
        view.onMessage(messageData);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  void onMessage(final String message) {
    Log.d(String.valueOf(this), "onMessage: " + message);
    final Handler mHandler = new Handler(Looper.getMainLooper());
    mHandler.post(
      new Runnable() {

        @Override
        public void run() {
          channel.invokeMethod("onUnityViewMessage", message);
        }
      }
    );
  }