JED - Nether overworld

{
  "dimensions": [
    {
      "dim": 0,
      "override": true,
      "dimensiontype": {
        "id": 0,
        "name": "Nether Overworld",
        "suffix": "_dim0",
        "keeploaded": true,
        "worldprovider": "WorldProviderHellJED"
      }
    }
  ]
}