[alibaba/fastjson]泛型多层嵌套泛型丢失，请问该如何反序列化啊

public class Response<T> {

    private String field;

    private ResponseEntity<T>;
}

public ResponseEntity<T> {

    private String entity;

   private List<T> items;
}

public abstract class AbstractSearchImpl<T> {

   // 省略大部分代码
    public BaseSearchResponse search(Request request) {
           return JSONObject.parseObject(searchResult.getResult(), new TypeReference<BaseSearchResponse<T>>() {
            });
    }
}

public class SearchDemo extends AbstractSearchImpl<DemoResult> {

}

以上，但是最后ResponseEntity#items中的实际类型，还是jsonObject，请问该如何解决啊