anchor.diff:   * * HttpServer is a Stream. Refer to the [Stream] class for information
    * about the streaming qualities of an HttpServer.
    * Pausing the subscription of the stream, pauses at the OS level.
  - * 
  + *
    * * The [http_server](https://pub.dartlang.org/packages/http_server)
    * package on pub.dartlang.org contains a set of high-level classes that,
    * together with this class, makes it easy to provide content through HTTP
  
positive.code:  * The server sends its response to the client by writing to the
   * HttpResponse object.
   *
   * ## Writing the response 
   *
   * This class implements [IOSink].
   * After the header has been set up, the methods
  
negative.code:  * Use [bindSecure] to create an HTTPS server.
   *
   * The server presents a certificate to the client. In the following
   * example, the certificate is named `localhost_cert` and comes from
   * the database found in the `pkcert` directory.
   *
   *     import 'dart:io';
   *     import "dart:isolate";
   *
  