/// <summary>
 /// Deletes a registered scroll request on the cluster
 /// <para> </para>http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-scroll.html
 /// </summary>
 /// <param name="client"></param>
 /// <param name="scrollId">The scrollId to clear</param>
 public static Task <IEmptyResponse> ClearScrollAsync(this IElasticClient client, string scrollId)
 {
     return(client.ClearScrollAsync(s => s.ScrollId(scrollId)));
 }