nsresult GetStyleData(nsStyleStructID       aSID, const nsStyleStruct*& aStyleStruct) const { return GetStyleDataExternal(aSID, aStyleStruct); }
GetStyleData(nsIFrame* aFrame, const T** aStyleStruct) { aFrame->GetStyleData(NS_GET_STYLESTRUCTID(T), *NS_REINTERPRET_CAST(const nsStyleStruct**, aStyleStruct)); }
  nsresult GetStyleData(nsStyleStructID       aSID,                        const nsStyleStruct*& aStyleStruct) const {    return GetStyleDataExternal(aSID, aStyleStruct);  }