Does not contain a definition for `clientOwnedObjects'??

So Unity gives me this error when trying to retrieve the player object when he disconnects

The docs tell me that clientOwnedObjects can be found in NetworkConnection:
http://docs.unity3d.com/ScriptReference/Networking.NetworkConnection.html

This however returns an error:
And I get this error:
Does not contain a definition for `clientOwnedObjects'??