return mRule->GetDOMRule(aParent);
nsCOMPtr<nsICSSGroupRule> rule; Rule()->GetParentRule(getter_AddRefs(rule)); if (!rule) { *aParentRule = nsnull; return NS_OK; } return rule->GetDOMRule(aParentRule);
DOMCSSDeclarationImpl::GetParentRule(nsIDOMCSSRule **aParent){  NS_ENSURE_ARG_POINTER(aParent);  if (!mRule) {    *aParent = nsnull;    return NS_OK;  }  return mRule->GetDOMRule(aParent);}