NS_IMETHOD HasAttributeNS(const nsString& aNamespaceURI, const nsString& aLocalName, PRBool* aReturn) {
NS_IMETHOD HasAttributeNS(const nsAReadableString& aNamespaceURI, const nsAReadableString& aLocalName, PRBool* aReturn) {
  NS_IMETHOD HasAttributeNS(const nsString& aNamespaceURI,                            const nsString& aLocalName, PRBool* aReturn) {    return mInner.HasAttributeNS(aNamespaceURI, aLocalName, aReturn);  }