Как получить buttonList ванильного gui? [Forge 1.12.2]

[xside]

Как получить buttonList или отображать свой gui поверх ванильного gui?
Пробовал это, не сработало

Спойлер: Код

    @SubscribeEvent
    public void onMultiplayerMenu(GuiOpenEvent event) {
        try
        {
            GuiScreen activeGUI = Minecraft.getMinecraft().currentScreen;

            if(activeGUI != null && activeGUI instanceof GuiMultiplayer) //whatever GUI you want to add a/multiple button/s to
            {
                Field field = GuiScreen.class.getDeclaredField("buttonList");
                field.setAccessible(true);

                List buttonList = (List) field.get(activeGUI);

                if(buttonList.size() < 1) //this has to be one smaller than the number of buttons it usually has, else you will keep adding your button over and oever again
                {
                    buttonList.add(new GuiButton(100, 2, 5, "Nickname")); //you have to make a class extending GuiButton to add function to your button
                }
            }
        }

        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

 

[VIZZI]

GuiScreenEvent.InitGuiEvent.Post