JED - Flat water world

{
    "dimensions": [
        {
            "dim": 0,
            "override": true,
            "dimensiontype": {
                "id": 0,
                "name": "Overworld",
                "suffix": "",
                "keeploaded": true,
                "worldprovider": "WorldProviderSurfaceJED"
            },
            "worldinfo_onetime": {
                "generatorName": "flat",
                "generatorOptions": "3;minecraft:bedrock,61*minecraft:water;1;"
            }
        }
    ]
}