UNet equivalent of OnDisconnectedFromServer

This is my first attempt at creating a multiplayer game since UNet's release and I am having trouble with one function. In the legacy networking system, there was the function:

 OnDisconnectedFromServer(NetworkDisconnection disconnection)
 {
 
 }

which could be used to tell if the game client's player disconnected (or was disconnected forcefully) from a game. In UNet, I am having trouble finding the equivalent. The only thing I could think of that might work is doing this:

 client.RegisterHandler (MsgType.Disconnect, OnDisconnect);

with the disconnect function:

 void OnDisconnect(NetworkMessage msg)
 {
     Debug.Log ("Disconnected");
 }

Yet, even this does not work; the OnDisconnect message never gets executed on the client (it seems registering this handler is only called on the server when a player disconnects from the game). Does anyone know the equivalent -- or how to implement an equivalent -- of OnDisconnectedFromServer in UNet?