anchor.diff:   * Compose a set of Middleware and a Handler.
    */
   var myHandler = const shelf.Pipeline()
  -    .addMiddleware(myMiddleware())
  +    .addMiddleware(myMiddleware)
       .addHandler(simpleHandler);
   
   /**
  
positive.code: void main() async {
    var server = await io.serve(myHandler, '127.0.0.1', 8080);
    print('Serving at http://${server.address.host}:${server.port}');
  }
negative.code:  * Middleware to modify incoming request and hands it to the innerHandler.
   * Returns new Future<shelf.Response> object.
   */
  shelf.Middleware myMiddleware =
      shelf.createMiddleware(responseHandler: modifyResponse);
  
  /**
   * Small function that modifies an outgoing response.
  