nsCOMPtr<nsIDOMNode> next; mDOMNode->GetNextSibling(getter_AddRefs(next));  if (next) { *_retval = new nsHTMLSelectOptionAccessible(mParent, next, mPresShell); if ( ! *_retval ) return NS_ERROR_FAILURE; NS_ADDREF(*_retval); }
NS_IMETHODIMP nsHTMLSelectListAccessible::GetAccNextSibling(nsIAccessible **_retval){  *_retval = nsnull;  return NS_OK;}