Unity 4.3 iAd Error handling. No ADBannerView.error

Since ADBannerView.error has been removed, how do we find out if the add hasn’t loaded due to an error?

check
http://docs.unity3d.com/Documentation/ScriptReference/ADBannerView-loaded.html
and for recommended new way of doing things check sample here
http://docs.unity3d.com/Documentation/ScriptReference/ADBannerView.html