throw new DomEx(DomEx.NOT_SUPPORTED_ERR);
throw new DomDOMException(DOMException.NOT_SUPPORTED_ERR);
  public void setXmlVersion(String xmlVersion)  {    if (xmlVersion == null)      {        xmlVersion = "1.0";      }    if ("1.0".equals(xmlVersion) ||        "1.1".equals(xmlVersion))      {        version = xmlVersion;      }    else      {        throw new DomEx(DomEx.NOT_SUPPORTED_ERR);      }  }