code: def start(self, host='127.0.0.1', port=None, debug=False, **kwargs):
          
          self.server.run(host=host, port=port, debug=debug, **kwargs)
docs: Start the built in webserver, bound to the host and port you'd like.
          Default host is `127.0.0.1` and port 8080.
  
          :param host: The host you want to bind the build in webserver to
          :param port: The port number you want the webserver to run on
          :param debug: Set to `True` to enable debug level logging
          :param kwargs: Additional arguments you'd like to pass to Flask