[
  {
    "title": "xxxx",
    "key": "1",
    "folder": false,
    "machine": "localhost"
  },
  {
    "title": "Folder 2",
    "key": "2",
    "folder": true,
    "children": [
      {
        "title": "Node 2.1",
        "key": "3",
        "machine":"aa"
      },
      {
        "title": "Node 2.2",
        "key": "4",
        "machine":"bb"
      }
    ]
  },
  {
    "title": "Folder 3",
    "key": "2",
    "folder": true,
    "children": [
      {
        "title": "Node 2.1",
        "key": "3"
      },
      {
        "title": "Node 2.2",
        "key": "4"
      }
    ]
  }
]