anchor.diff:    Duration deadline;
   
     /**
  -   * Get or set if the [HttpResponse] should buffer output.
  +   * Gets or sets if the [HttpResponse] should buffer output.
      *
      * Default value is `true`.
      *
  
positive.code:   set badCertificateCallback(
        bool callback(X509Certificate cert, String host, int port));
  
    /**
     * Shut down the HTTP client. If [force] is `false` (the default)
     * the [HttpClient] will be kept alive until all active
     * connections are done. If [force] is `true` any active
     * connections will be closed to immediately release all
     * resources. These closed connections will receive an error
     * event to indicate that the client was shut down. In both cases
     * trying to establish a new connection after calling [close]
     * will throw an exception.
     */
    void close({bool force: false});
  }
  
  
negative.code:  */
  abstract class HttpServer implements Stream<HttpRequest> {
    /**
     * Gets and sets the default value of the `Server` header for all responses
     * generated by this [HttpServer].
     *
     * If [serverHeader] is `null`, no `Server` header will be added to each
  