public static Task WriteHelloAsync(this HttpContext context, IEnumerable <WebServerAgent> webServerAgents, CancellationToken cancellationToken = default) => WebServerAgent.WriteHelloAsync(context, webServerAgents, cancellationToken);
 public static Task WriteHelloAsync(this HttpContext context, WebServerAgent webServerAgent, CancellationToken cancellationToken = default) => webServerAgent.WriteHelloAsync(context, cancellationToken);