{
    "dimensions": [
        {
            "dim": 0,
            "normal_biomes": true,
            "worldinfo_onetime": {
                "generatorName": "flat",
                "generatorOptions": "3;1*minecraft:bedrock,254*minecraft:stone,1*minecraft:bedrock;1;"
            },
            "jed": {
                "SpawnPointSearchType": {
                    "type": "cavern",
                    "min_y": 10,
                    "max_y": 240
                }
            }
        }
    ]
}