anchor.diff:  
     /// Destroys the websocket connection, and all streams.
     Future<Null> destroy() async {
  +    await this._ws.close();
       await this._events.destroy();
       return null;
     }
  
positive.code:   String _token;
    ClientOptions _options;
    DateTime _startTime;
    _EventController _events;
  
    /// The HTTP client.
  
negative.code: 
      this.http = new Http._new(this);
      this._events = new _EventController(this);
      this._ws = new _WS(this);
    }
  
    /// The client's uptime.
  