{
  "version": "0.1",
  "nodes": {
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      "name": "c1",
      "op": {
        "type": "Cylinder",
        "radius": 3,
        "height": 10,
        "segments": 64
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 3,
      "material": "default"
    }
  ]
}