listenerTyped := &listener.Listener{}
		// Support v2 or v3 in config dump. See ads.go:RequestedTypes for more info.
		l.ActiveState.Listener.TypeUrl = v3.ListenerType
		err := l.ActiveState.Listener.UnmarshalTo(listenerTyped)
		if err != nil {
			return
		}
		listeners = append(listeners, listenerTyped)
	}
	Print(writer, listeners)