code: public void upgrade(ConnectionProtocol upgrade)
    {
      connHttp().request(upgrade);
      //_upgrade = upgrade;
      
      //upgrade.start();
      
      requestHttp().upgrade();
      
      _state = _state.toUpgrade();
      
      requestHttp().connTcp().proxy().requestWake();
    }
docs: /*
  long sequence()
  {
  return _sequenceRead;
  }