functionScoreQueryBuilder.boostMode(CombineFunction.REPLACE);
        return functionScoreQueryBuilder;
    }

    protected QueryRescorerBuilder buildRescore() {
        return new QueryRescorerBuilder(
                QueryBuilders.functionScoreQuery(ScoreFunctionBuilders.randomFunction().seed(seed).setField("_seq_no"))).setQueryWeight(0)
                .setRescoreQueryWeight(1);
    }