NS_IMETHOD AddObserver(nsIRDFObserver* n) { return mInner->AddObserver(n);
nsWindowMediator::AddObserver(nsIRDFObserver* aObserver) { if (! aObserver) return NS_ERROR_NULL_POINTER;  if (! mObservers) { nsresult rv; rv = NS_NewISupportsArray(getter_AddRefs(mObservers)); if (NS_FAILED(rv)) return rv;
  NS_IMETHOD AddObserver(nsIRDFObserver* n)  {      return mInner->AddObserver(n);  }