[
  {
    "weight": 1,
    "value": {
      "template": "the_vault:empty",
      "palettes": []
    }
  },
  {
    "weight": 1,
    "pool": [
      {
        "weight": 4,
        "reference": "the_vault:vault/decor/generic/references/ore/9x9/burrow1"
      }
    ]
  }
]