NS_IMETHOD SetAttributeNS(const nsString& aNamespaceURI, const nsString& aQualifiedName, const nsString& aValue) {
NS_IMETHOD SetAttributeNS(const nsAReadableString& aNamespaceURI, const nsAReadableString& aQualifiedName, const nsAReadableString& aValue) {
  NS_IMETHOD SetAttributeNS(const nsString& aNamespaceURI,                            const nsString& aQualifiedName,                            const nsString& aValue) {    return mInner.SetAttributeNS(aNamespaceURI, aQualifiedName, aValue);  }