/// <summary>
        /// React on ShowViewModelRequestEvent.
        /// </summary>
        /// <param name="args">Event data.</param>
        protected override void BringtToFrontViewModel(BringToFrontViewModelRequestEventArgs args)
        {
            if (this.PackageController == null)
                return;

            if (this.PackageController.CurrentShellViewModel != this)
                return;

            this.PackageController.BringtToFrontViewModel(args);
        }
 /// <summary>
 /// React on ShowViewModelRequestEvent.
 /// </summary>
 /// <param name="args">Event data.</param>
 public virtual void BringtToFrontViewModel(BringToFrontViewModelRequestEventArgs args)
 {
     if (args.SourceViewModel is IDockableViewModel)
     {
         this.LayoutManager.BringToFrontWindow(args.SourceViewModel as IDockableViewModel);
     }
 }
 /// <summary>
 /// React on ShowViewModelRequestEvent.
 /// </summary>
 /// <param name="args">Event data.</param>
 protected override void BringtToFrontViewModel(BringToFrontViewModelRequestEventArgs args)
 {
     if (args.SourceViewModel is IDockableViewModel)
     {
         this.LayoutManager.BringToFrontWindow(args.SourceViewModel as IDockableViewModel);
     }
 }