es GET index/_count转化为restHighLevelClient怎么写？

public static void main(String[] args) throws IOException {

        List<String> fieldList = Arrays.asList("FieldA", "FieldB");



        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();

        fieldList.forEach(field -> boolQueryBuilder.must(QueryBuilders.existsQuery(field)));

        searchSourceBuilder.query(boolQueryBuilder);

        CountRequest countRequest = new CountRequest()

                .indices("index")

                .types("type") // not exists in 7+

                .source(searchSourceBuilder);

        CountResponse countResponse = restHighLevelClient.count(countRequest, RequestOptions.DEFAULT);

        System.out.println("Count:" + countResponse.getCount());

    }