[{
  "text": "Root",
  "type": "root",
  "state": {"opened": true},
  "children": [{
    "text": "Directory"
  }, {
    "text": "File unread",
    "type": "file"
  }, {
    "text": "Another directory",
    "state": {"opened": true},
    "children": [{
      "text": "File text",
      "type": "text"
    }, {
      "text": "File word",
      "type": "text"
    }, {
      "text": "File excel",
      "type": "excel"
    }, {
      "text": "File powerpoint",
      "type": "ppt",
      "state": {"disabled": true}
    }, {
      "text": "File pdf",
      "type": "pdf"
    }, {
      "text": "File archive",
      "type": "archive"
    }, {
      "text": "File image",
      "type": "image"
    }, {
      "text": "File audio",
      "type": "audio"
    }, {
      "text": "File video",
      "type": "video"
    }]
  }, {
    "text": "Something else"
  }, {
    "text": "File unread",
    "type": "file"
  }]
}]