{
  "End": {
  
    // Should end generate as in default world type? [default: false]
    "Default": true,
    
    // Should the main island be generated as normal? [default: true]
    "mainIsland": true
  },
  
  "Nether": {
  
    // Should nether generate as in default world type? [default: false]
    "Default": true,
    
    // File name in template directory of a valid template containing a nether portal
    "netherPortalStructure": null
  },
  
  "Overworld": {
  
    // Should overworld generate as in default world type? [default: false]
    "Default": false
  }
}