@Override
        public void configureRestClientBuilder(RestClientBuilder restClientBuilder) {
            if (pathPrefix != null) {
                restClientBuilder.setPathPrefix(pathPrefix);
            }
        }
Serializable {@link RestClientFactory} used by the sink.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/elasticsearch-7/src/main/java/org/apache/inlong/sort/elasticsearch7/table/Elasticsearch7DynamicSink.java