@Override
  public VBStyleCollection<E, K> clone() {
    VBStyleCollection<E, K> c = new VBStyleCollection<>();
    c.addAll(new ArrayList<>(this));
    c.setMap(new HashMap<>(map));
    c.setLstKeys(new ArrayList<>(lstKeys));
    return c;
  }
@Override
  public VBStyleCollection<E, K> clone()