already_AddRefed<nsINode> TreeWalker::LastChild(ErrorResult& aResult) { return FirstChildInternal(true, aResult); }
/* nsIDOMNode lastChild (); */ NS_IMETHODIMP nsTreeWalker::LastChild(nsIDOMNode **_retval) { return FirstChildInternal(PR_TRUE, _retval); }
/* nsIDOMNode firstChild (); */ NS_IMETHODIMP nsTreeWalker::FirstChild(nsIDOMNode **_retval) { return FirstChildInternal(false, _retval); }