class SearchServiceFallbackFactory implements FallbackFactory<SearchService> {
    @Override
    public SearchService create(Throwable throwable) {<FILL_FUNCTION_BODY>}
}

        return (indexName, searchDto) -> {
            log.error("通过索引{}搜索异常:{}", indexName, throwable);
            return PageResult.<JsonNode>builder().build();
        };
    
<no_super_class>