NS_IMETHOD    GetElementsByTagNameNS(const nsString& aNamespaceURI, const nsString& aLocalName, nsIDOMNodeList** aReturn) {
NS_IMETHOD    GetElementsByTagNameNS(const nsAReadableString& aNamespaceURI, const nsAReadableString& aLocalName, nsIDOMNodeList** aReturn) {
  NS_IMETHOD    GetElementsByTagNameNS(const nsString& aNamespaceURI, const nsString& aLocalName, nsIDOMNodeList** aReturn) {    return NS_OK;  }