How do I know when composition of parts completed on Silverlight client?

#region IdeaBlade trace hookup
        private void SubscribeToTracePublisher()
        {
            this.subscriber.Publish += this.NotificationHandler;
            this.subscriber.StartSubscription();
            CompositionHost.Recomposed += this.CompositionHostRecomposed;
        }
        private void CompositionHostRecomposed(object sender, RecomposedEventArgs e)
        {
            Debug.WriteLine("IdeaBlade.CompositionHostRecomposed");
        }
        private void NotificationHandler(object sender, PublishEventArgs e)
        {
            Debug.WriteLine(e.TraceMessage);
        }
        #endregion

// Get manager and subscribe to recompose IdeaBlade
            var manager = this.Container.GetExportedValue<IModuleManager>();
            var regionManager = this.Container.GetExportedValue<IRegionManager>();
            manager.LoadModuleCompleted += (o, e) =>
            {
                var uri = new Uri(e.ModuleInfo.Ref, UriKind.Relative);
                CompositionHost.Add(uri);
                if (e.ModuleInfo.ModuleName.Equals("DispatchModule"))
                {
                    regionManager.RequestNavigate(RegionNames.Tabs, "MaintainDriverView");
                }
            };