{
  "version": 8,
  "sources": {
    "source": {
      "type": "vector",
      "tiles": []
    }
  },
  "layers": [{
    "id": "a",
    "type": "symbol",
    "source": "source",
    "source-layer": "source-layer",
    "layout": {
      "text-font": ["a"]
    }
  }, {
    "id": "a,b",
    "type": "symbol",
    "source": "source",
    "source-layer": "source-layer",
    "layout": {
      "text-font": {
        "stops": [[0, ["a", "b"]]]
      }
    }
  }, {
    "id": "a,b;a,b,c",
    "type": "symbol",
    "source": "source",
    "source-layer": "source-layer",
    "layout": {
      "text-font": {
        "stops": [[0, ["a", "b"]], [1, ["a", "b", "c"]]]
      }
    }
  }]
}