[QUESTION]如何处理复杂对象的反序列化

###序列化复杂嵌套对象时，对象内含有抽象类和不可变元祖！
例如：private LinkedHashMap> path = Maps.newLinkedHashMapWithExpectedSize(16);

报错：com.alibaba.fastjson2.JSONException: TODO : OBJECT -90

###Fastjson2如何设置反序列化自定义解析器？
FastJosn有ObjectDeserialize，但是FastJson2通过
` public static class LinkedHashMapStringPairReader implements ObjectReader>> {}
static{
JSONFactory.getDefaultObjectReaderProvider().register(new TypeReference>>(){}.getType(), new GridStructFastJsonDeserializer.LinkedHashMapStringPairReader());
}

`
这种方式不生效

Start with the reported LinkedHashMap> type, the OBJECT -90 exception, and the ObjectReader registration snippet. Trace how JSONFactory.getDefaultObjectReaderProvider().register(...) resolves that TypeReference and compare it with Fastjson2's deserialization path; done means the nested object can be deserialized without the exception or the supported approach is clearly established.

Written by the indexing model from the issue text.