{
  "type": "minecraft:overworld",
  "generator": {
    "type": "minecraft:flat",
    "settings": {
      "biome": "minecraft:forest",
      "lakes": false,
      "features": false,
      "layers": [
        {
          "height": 153,
          "block": "minecraft:air"
        },
        {
          "height": 1,
          "block": "minecraft:barrier"
        }
      ]
    }
  }
}