@Override
  public SelectorBasedResponseHandler clone() {
    SelectorBasedResponseHandler clone = (SelectorBasedResponseHandler)super.clone();
    clone.selectors = new LinkedHashMap<>(selectors.size());
    for (Selector selector : selectors.values()) {
      clone.selectors.put(selector.getName(), selector.clone());
    }
    return clone;
  }
@Override
  public SelectorBasedResponseHandler clone()