NS_IMETHOD IndexOf(nsIContent* aPossibleChild, PRInt32& aResult) const { return mInner.IndexOf(aPossibleChild, aResult);
nsHTMLOptionCollection::IndexOf(nsIContent* aOption) { nsCOMPtr<nsIDOMHTMLOptionElement> option;  if (mDirty && (nsnull != mSelect)) { GetOptions();
  NS_IMETHOD IndexOf(nsIContent* aPossibleChild, PRInt32& aResult) const {    return mInner.IndexOf(aPossibleChild, aResult);  }