public Task <TResponse> RetryAsync <TResponse>(string index, RetryIlmRequestParameters requestParameters = null, CancellationToken ctx = default)
     where TResponse : class, ITransportResponse, new() => DoRequestAsync <TResponse>(POST, Url($"{index:index}/_ilm/retry"), ctx, null, RequestParams(requestParameters));
 ///<summary>POST on /{index}/_ilm/retry <para>https://www.elastic.co/guide/en/elasticsearch/reference/current/ilm-retry-policy.html</para></summary>
 ///<param name = "index">The name of the indices (comma-separated) whose failed lifecycle step is to be retry</param>
 ///<param name = "requestParameters">Request specific configuration such as querystring parameters &amp; request specific connection settings.</param>
 public TResponse Retry <TResponse>(string index, RetryIlmRequestParameters requestParameters = null)
     where TResponse : class, ITransportResponse, new() => DoRequest <TResponse>(POST, Url($"{index:index}/_ilm/retry"), null, RequestParams(requestParameters));