{
  "propertySpec": {
    "type": "color",
    "default": {
      "stops": [
        [0, "rgba(0, 0, 255, 0)"],
        [0.1, "royalblue"],
        [0.3, "cyan"],
        [0.5, "lime"],
        [0.7, "yellow"],
        [1, "red"]
      ]
    },
    "property-type": "data-driven",
    "expression": {"parameters": ["zoom", "feature"]}
  },
  "expression": [
    "interpolate",
    ["linear"],
    ["heatmap-density"],
    0,
    "#000000",
    1,
    "#ff0000"
  ],
  "inputs": [[{"heatmapDensity": 0.5}, {}]],
  "expected": {
    "compiled": {
      "result": "success",
      "isFeatureConstant": true,
      "isZoomConstant": true,
      "type": "color"
    },
    "outputs": [[0.5, 0, 0, 1]],
    "serialized": [
      "interpolate",
      ["linear"],
      ["heatmap-density"],
      0,
      ["rgba", 0, 0, 0, 1],
      1,
      ["rgba", 255, 0, 0, 1]
    ]
  }
}