{
  "description": "Adds an extra Value type called \"my_value\" which is invalid. In the future there might be backwards compatible Values and they should be ignored by decoders, but for version 2.x this should be a fatal error.",
  "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",
    "extensions 8 to max;",
    "optional int64 my_value = 20; extensions 21 to max;"
  ]
}