OpenSearch Java Client GitHub repo声明Java Client是高级Java Client的替代品。
https://github.com/opensearch-project/opensearch-java
我试图用这个客户端创建一个索引，但是找不到任何实际设置Map的方法，而且没有示例。

RestClient restClient = RestClient
        .builder(new HttpHost(host, port, scheme))
        .build();
Transport transport = new RestClientTransport(restClient, new JacksonJsonpMapper());
OpenSearchClient client = new OpenSearchClient(transport);

CreateIndexRequest createIndexRequest = new CreateIndexRequest.Builder()
         .index(index)
         // What do I do here?
         .build();

CreateIndexResponse response = client.indices().create(createIndexRequest);

这是使用OpenSearch Java客户端，而不是高级客户端。