throw new DomEx(DomEx.NOT_FOUND_ERR, null, node, 0);
throw new DomDOMException(DOMException.NOT_FOUND_ERR, null, node, 0);
  public Attr removeAttributeNode(Attr node)  {    if (attributes == null)      {        throw new DomEx(DomEx.NOT_FOUND_ERR, null, node, 0);      }    return (Attr) attributes.removeNamedItem(node.getNodeName());  }