{
 "fieldGroups": [
  {
   "name": "Fuel",
   "restrictive": true,
   "fields": [
    "concern",
    "fuels"
   ]
  },
  {
   "name": "Piles",
   "restrictive": true,
   "fields": [
    "concern",
    "piles"
   ]
  }
 ]
}