{
    "tile_processors": [
      {
        "type": "placeholder",
        "target": "DUNGEON_DOOR",
        "levels": [
          {
            "level": 0,
            "probability": 1.0,
            "success": {
              "minecraft:stone": 1
            },
            "failure": {
              "minecraft:stone": 1
            }
          }
        ]
      }
    ]
  }