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