如何在存储桶排序聚合期间在Java Elasticsearch客户端中指定from子句

SearchRequest searchRequest = new SearchRequest("index_name");
searchRequest.types("type_name"); // 可选，指定类型

SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

// 设置聚合
TermsAggregationBuilder aggregation = AggregationBuilders.terms("agg_name").field("field_name");
sourceBuilder.aggregation(aggregation);

// 设置分页参数
int pageSize = 10; // 每页记录数
int pageNum = 1; // 当前页码
int from = (pageNum - 1) * pageSize; // 计算from值
sourceBuilder.from(from);
sourceBuilder.size(pageSize);

searchRequest.source(sourceBuilder);

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