nsXULElement::GetParent(nsIContent*& aResult) const { aResult = mParent; NS_IF_ADDREF(mParent); return NS_OK; }
nsIContent* GetParent() const {    return NS_REINTERPRET_CAST(nsIContent *, mParentPtrBits); }
nsXULElement::GetParent(nsIContent*& aResult) const{    aResult = mParent;    NS_IF_ADDREF(mParent);    return NS_OK;}