/// <summary>
        /// Note: this method is only executed when the Loaded event is fired,
        /// so setting DragThumbTemplate or ConnectorDecoratorTemplate
        /// properties after will have no effect.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="routedEventArgs"></param>
        private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
        {
            if (Template != null)
            {
                var contentPresenter = Template.FindName("PART_ContentPresenter", this) as ContentPresenter;
                if (contentPresenter != null)
                {
                    var contentVisual = VisualTreeHelper.GetChild(contentPresenter, 0) as UIElement;
                    if (contentVisual != null)
                    {
                        // Find your templates in here

                        var drag = Template.FindName("PART_DragThumb", this) as DragThumb;
                        if (drag != null)
                        {
                            var template = GetDragThumbTemplate(contentVisual);
                            if (template != null)
                            {
                                drag.Template = template;
                            }
                        }

                        var connector = Template.FindName("PART_ConnectorDecorator", this) as Control;
                        if (connector != null)
                        {
                            connector.Template = ConnectorXamlFactory.CreateTemplate("ConnectorDecoratorTemplate", BlockModel.Connectors);
                        }
                    }
                }
            }
        }
        public void RedrawModel(BlockViewModel model)
        {
            var connector = model.Template.FindName("PART_ConnectorDecorator", model) as Control;

            if (connector != null)
            {
                connector.Template = ConnectorXamlFactory.CreateTemplate("ConnectorDecoratorTemplate", model.BlockModel.Connectors);
            }
            OnModelRedraw(this, model.BlockModel);
        }