public SankeyDiagram()
        {
            styleManager = new SankeyStyleManager(this);
            assist = new SankeyDiagramAssist(this, styleManager);

            Loaded += (s, e) =>
            {
                if (IsDiagramCreated)
                {
                    return;
                }

                assist.CreateDiagram(Datas);
                IsDiagramCreated = true;
            };
        }