{
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  "features": [
    {"type": "Feature", "properties": {}, "geometry": {"type": "Point", "coordinates": [1, 2]}},
    {"type": "Feature", "properties": {"foo": 42}, "geometry": {"type": "Point", "coordinates": [3, 4]}},
    {"type": "Feature", "properties": {"foo": -4}, "geometry": {"type": "Point", "coordinates": [7, 8]}}
  ]
}