{
  "widgettype": "Tree",
  "options": {
    "idField": "id",
    "textField": "name", 
    "data": [
      {
        "id": "1",
        "name": "根节点",
        "children": [
          {
            "id": "1-1",
            "name": "子节点1"
          },
          {
            "id": "1-2", 
            "name": "子节点2",
            "children": [
              {
                "id": "1-2-1",
                "name": "孙子节点"
              }
            ]
          }
        ]
      }
    ]
  }
}