如何使用elastic search java API编写多个分数函数？

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.15.0</version>
</dependency>

RestHighLevelClient client = new RestHighLevelClient(
        RestClient.builder(new HttpHost("localhost", 9200, "http")));

SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
FunctionScoreQueryBuilder functionScoreQueryBuilder = QueryBuilders.functionScoreQuery()
        .add(QueryBuilders.matchQuery("field1", "value1"), ScoreFunctionBuilders.weightFactorFunction(2))
        .add(QueryBuilders.matchQuery("field2", "value2"), ScoreFunctionBuilders.weightFactorFunction(3))
        .scoreMode(FunctionScoreQuery.ScoreMode.SUM);

sourceBuilder.query(functionScoreQueryBuilder);
SearchRequest searchRequest = new SearchRequest("index_name");
searchRequest.source(sourceBuilder);

SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);