[
  {
    "weight": 910,
    "reference": "the_vault:vault/rooms/festive_common_rooms"
  },
  {
    "weight": 70,
    "reference": "the_vault:vault/rooms/challenge_rooms"
  },
  {
    "weight": 20,
    "reference": "the_vault:vault/rooms/omega_rooms"
  },
  {
    "weight": 5,
    "value": {
      "template": "the_vault:vault/rooms/omega/cozy1",
      "palettes": [ "the_vault:festive/base" ]
    }
  }
]