com.github.j5ik2o.reactive.aws
https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/services/elasticsearch/ElasticsearchAsyncClient.html
https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/services/elasticsearch/ElasticsearchClient.html
https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/services/elasticsearch/ElasticsearchAsyncClient.html