-serif',
          wrap: go.Wrap.Fit,
          desiredSize: new go.Size(200, NaN),
          alignment: go.Spot.Center,
          margin: 6
        })
          .bind('text', '', tooltipTextConverter)
      );

    // define the Node template for non-leaf nodes
    myDiagram.nodeTemplateMap.add(
      'decision',
      new go.Node('Auto')
        .bind('text', 'key')
        // define the node's outer shape, which will surround the Horizontal Panel
        .add(
          new go.Shape('Rectangle', { fill: 