'text', 'key')
        .add(
          new go.Shape('Rectangle', { fill: 'whitesmoke', stroke: 'lightgray' }),
          new go.TextBlock({
            font: '13px Roboto, sans-serif',
            wrap: go.Wrap.Fit,
            desiredSize: new go.Size(200, NaN),
            margin: 5
          })
            .bind('text', 'text')
        )
    );

    // define the only Link template
    myDiagram.linkTemplate = new go.Link({ routing: go.Routing.Orthogonal, fromPortId: '' }) // the whole link panel
      .