about use AssetManager load FreeTypeFont

[Rail1bc]

libdgx v:1.12.1
skin-composer ver.58

Using translation software may result in ambiguity, please forgive me
使用翻译软件，可能存在歧义，请见谅

I am learning to try using freetype font placeholders with custom serializers and Asset Manager to load skin.json
Due to some issues regarding relative paths, I have to use Asset Manager
Follow the instructions on the wiki https://github.com/raeleus/skin-composer/wiki/Creating-FreeType-Fonts#using-a-custom-serializer
I tried to use it
我学习尝试使用 freetype字体占位符 配合 自定义序列化程序 与AssetManager，加载skin.json
因为一些关于相对路径的问题，我必须使用 AssetManager
按照wiki的指引 https://github.com/raeleus/skin-composer/wiki/Creating-FreeType-Fonts#using-a-custom-serializer
我尝试使用

AssetManager assetManager = new AssetManager();
assetManager.setLoader(Skin.class, new FreeTypeSkinLoader(assetManager.getFileHandleResolver()));
assetManager.load("skin-name.json", Skin.class);

But the idea report cannot find FreeTypeSkinLoader
I am not sure if FreeTypeSkinLoader has been deprecated in previous versions or if I need to implement a FreeTypeSkinLoader myself
If I need to implement a FreeTypeSkinLoader myself, I lack examples to learn and imitate it
但是idea 报告 找不到 FreeTypeSkinLoader
我不清楚FreeTypeSkinLoader是否已经在曾经的版本弃用，或需要我自己实现一个FreeTypeSkinLoader
如果需要我自己实现一个FreeTypeSkinLoader，我缺乏学习模仿的示例

My libgdx project repository: https://github.com/Rail1bc/cn.tldream.ff
Currently, I am not using a custom serialization program. Instead, I am loading regular skin.json and manually loading the combination of freetypefont and skin
我的libgdx项目仓库：https://github.com/Rail1bc/cn.tldream.ff
当前我没有使用 自定义序列化程序，而是加载普通的skin.json，然后手动加载freetypefont与skin组合