public class ExampleMod implements ModInitializer {

    [...]
    public static final ScreenHandlerType<BoxScreenHandler> BOX_SCREEN_HANDLER;

    static {
        [...]
       
        //我们现在使用 registerExtended 作为我们的 screenHandler 现在在其构造函数中接受一个 packetByteBuf
        BOX_SCREEN_HANDLER = ScreenHandlerRegistry.registerExtended(BOX, BoxScreenHandler::new);
    }

    @Override
    public void onInitialize() {

    }
}