DOMCSSDeclarationImpl::GetParentRule(nsIDOMCSSRule **aParent)
DOMCSSStyleRuleImpl::GetParentRule(nsIDOMCSSRule** aParentRule)
DOMCSSDeclarationImpl::GetParentRule(nsIDOMCSSRule **aParent){  NS_ENSURE_ARG_POINTER(aParent);  if (!mRule) {    *aParent = nsnull;    return NS_OK;  }  return mRule->GetDOMRule(aParent);}