data. The user can modify
    this data property via an additional context menu command.
  </p>
  <p>Assistant employees may themselves be bosses of their own employees. All of a boss's reports may be assistants.</p>
  <div>
    <div>
      <button id="SaveButton" onclick="save()">Save</button>
      <button onclick="load()">Load</button>
      Diagram Model saved in JSON format:
    </div>
    <textarea id="mySavedModel" style="width: 100%; height: 270px">
{ "class": "go.TreeModel",
  "nodeDataArray": [
{"