{
  "version": 7,
  "sources": {
    "vector": {
      "type": "vector",
      "url": "mapbox://mapbox.mapbox-streets-v5"
    }
  },
  "layers": [
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      "type": "fill",
      "source": "vector",
      "source-layer": "layer",
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        "fill-opacity-transition": {
          "duration": 500,
          "delay": -1,
          "bad": "value"
        },
        "bad-transition": {
          "duration": 400
        },
        "fill-antialias-transition": {
          "duration": 500
        }
      }
    },
    {
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      "type": "fill",
      "source": "vector",
      "source-layer": "layer",
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      }
    }
  ]
}