nsAppShellService::GetHiddenWindow(nsIXULWindow **aWindow)
nsAppShellService::GetHiddenWindow(nsIWebShellWindow **aWindow)
nsAppShellService::GetHiddenWindow(nsIXULWindow **aWindow){  NS_ENSURE_ARG_POINTER(aWindow);  *aWindow = mHiddenWindow;  NS_IF_ADDREF(*aWindow);  return *aWindow ? NS_OK : NS_ERROR_FAILURE;}