code: @Override
      public Collection duplicate(boolean deepCopy) {
  	new ArrayImpl().duplicate(deepCopy);
  	return new ListAsArray((List) Duplicator.duplicate(list, deepCopy));
      }
docs: /*---@Override
  public boolean containsKey(String key) {
  return get(key,null)!=null;
  }
  
  @Override
  public boolean containsKey(Key key) {
  super.containsKey(key)
  return get(key,null)!=null;
  }