public Task <TResponse> GetAsync <TResponse>(GetFeaturesRequestParameters requestParameters = null, CancellationToken ctx = default)
     where TResponse : class, ITransportResponse, new() => DoRequestAsync <TResponse>(GET, "_features", ctx, null, RequestParams(requestParameters));
 ///<summary>GET on /_features <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/get-features-api.html</para></summary>
 ///<param name = "requestParameters">Request specific configuration such as querystring parameters &amp; request specific connection settings.</param>
 public TResponse Get <TResponse>(GetFeaturesRequestParameters requestParameters = null)
     where TResponse : class, ITransportResponse, new() => DoRequest <TResponse>(GET, "_features", null, RequestParams(requestParameters));