    stroke: 'white',
                font: 'bold 10pt sans-serif'
              })
                .bind('text')
                .bind('stroke', 'color'),
              new go.TextBlock({
                alignment: go.Spot.Top,
                margin: new go.Margin(4, 0, 0, 0),
                stroke: 'white',
                font: 'bold italic 13pt sans-serif',
                isMultiline: false,
                editable: true
              })
                .bindTwoWay('text', 'value', (v) => v.toString(