private void CreateChildrenViews()
        {
            var manager = _model.Root.Manager;

            foreach (var childModel in _model.Children)
            {
                var lac = new LayoutAnchorControl(childModel);
                lac.SetBinding(LayoutAnchorControl.TemplateProperty, new Binding(DockingManager.AnchorTemplateProperty.Name)
                {
                    Source = manager
                });
                _childViews.Add(lac);
            }
        }
        private void OnModelChildrenCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
        {
            if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Remove ||
                e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Replace)
            {
                if (e.OldItems != null)
                {
                    {
                        foreach (var childModel in e.OldItems)
                        {
                            _childViews.Remove(_childViews.First(cv => cv.Model == childModel));
                        }
                    }
                }
            }

            if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Reset)
            {
                _childViews.Clear();
            }

            if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Add ||
                e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Replace)
            {
                if (e.NewItems != null)
                {
                    var manager     = _model.Root.Manager;
                    int insertIndex = e.NewStartingIndex;
                    foreach (LayoutAnchorable childModel in e.NewItems)
                    {
                        var lac = new LayoutAnchorControl(childModel);
                        lac.SetBinding(LayoutAnchorControl.TemplateProperty, new Binding(DockingManager.AnchorTemplateProperty.Name)
                        {
                            Source = manager
                        });
                        _childViews.Insert(insertIndex++, lac);
                    }
                }
            }
        }