code: def close(self, code: int = None, reason: str = None) -> None:
          
          if self.ws_connection:
              self.ws_connection.close(code, reason)
              self.ws_connection = None
docs: Closes this Web Socket.
  
          Once the close handshake is successful the socket will be closed.
  
          ``code`` may be a numeric status code, taken from the values
          defined in `RFC 6455 section 7.4.1
          <https://tools.ietf.org/html/rfc6455#section-7.4.1>`_.
          ``reason`` may be a textual message about why the connection is
          closing.  These values are made available to the client, but are
          not otherwise interpreted by the websocket protocol.
  
          .. versionchanged:: 4.0
  
             Added the ``code`` and ``reason`` arguments.