examples/invalid_geometries/invalid_less_three_unique_nodes.geojson

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "coordinates": [
          [
            [
              13.377016,
              52.512418
            ],
            [
              13.378182,
              52.51285
            ],
            [
              13.377016,
              52.512418
            ]
          ]
        ],
        "type": "Polygon"
      }
    }
  ]
}