{
  "type": "minecraft:swamp_hut",
  "biomes": "#minecraft:has_structure/swamp_hut",
  "spawn_overrides": {
    "creature": {
      "bounding_box": "piece",
      "spawns": [
        {
          "type": "minecraft:cat",
          "maxCount": 1,
          "minCount": 1,
          "weight": 1
        }
      ]
    },
    "monster": {
      "bounding_box": "piece",
      "spawns": [
        {
          "type": "minecraft:witch",
          "maxCount": 1,
          "minCount": 1,
          "weight": 1
        }
      ]
    }
  },
  "step": "surface_structures"
}