ElasticSearch批量添加父子文档

Question

 IndexResponse response = client.prepareIndex(index, parentType).setSource(parentJson, XContentType.JSON).get();
 client.prepareIndex(index, childType).setParent(response.getId()).setSource(childJson, XContentType.JSON).get(**strong text**);

我想找到同时批量添加父子文档的方式。