{
  "menu_tree": {
    "MiddleNode": {
      "name": "Category1",
      "children": [
        {
          "MiddleNode": {
            "name": "Category2",
            "children": [
              {
                "EndNode": {
                  "name": "Node1",
                  "index": 0
                }
              },
              {
                "EndNode": {
                  "name": "Node2",
                  "index": 1
                }
              }
            ]
          }
        },
        {
          "EndNode": {
            "name": "Node3",
            "index": 2
          }
        },
        {
          "EndNode": {
            "name": "Node4",
            "index": 3
          }
        }
      ]
    }
  },
  "graph": {
    "nodes": [
      "Node1",
      "Node2",
      "Node3",
      "Node4"
    ],
    "node_holes": [],
    "edge_property": "undirected",
    "edges": [
      [
        0,
        1,
        900
      ],
      [
        1,
        2,
        80
      ],
      [
        2,
        3,
        50
      ]
    ]
  }
}