{
 "cfnGather": {
  "gather": {
   "cluster": {
    "filter": {
     "type": "AWS::RDS::DBCluster"
    },
    "properties": {
     "Engine": {
      "path": "/Engine"
     }
    },
    "reference": "/DBClusterIdentifier"
   },
   "local": {
    "properties": {
     "Engine": {
      "path": "/Engine"
     }
    }
   }
  },
  "schema": {
   "properties": {
    "local": {
     "properties": {
      "Engine": {
       "const": {
        "$data": "/cluster/Engine"
       }
      }
     }
    }
   }
  }
 }
}
