{
  "description": "Missing layer version property. Proto2 parsers will default to 1, assuming they are using a .proto file. Proto3 will default to zero (since this is an int), which is invalid.",
  "specification_reference": "https://github.com/mapbox/vector-tile-spec/blob/master/2.1/README.md#41-layers",
  "validity": {
    "v1": false,
    "v2": false,
    "error": "fatal"
  },
  "proto": "2.1"
}