code: public static EventClientUtil getRestEventClientUtil(String elasticSearch){
  		JavaElasticSearch elasticSearchSink = getJavaElasticSearchSink( elasticSearch);
  		return elasticSearchSink.getEventRestClientUtil();
  	}
docs: 获取直接操作query dsl的rest api接口组件,所有的操作直接在elasticSearch对应的es服务器上操作
  @param elasticSearch
  @return