def METHOD_NAME():
    geom = {
        "geometry": {
            "coordinates": [
                [[6.90, 53.48], [5.98, 51.85], [6.07, 53.51], [6.90, 53.48]]
            ],
            "type": "Polygon",
        },
        "id": 27,
        "properties": {"type": "foo"},
        "type": "Feature",
    }
    feat = geom_obj(geom)
    with alt.data_transformers.enable(consolidate_datasets=False):
        spec = alt.Chart(feat).mark_geoshape().to_dict()
    assert spec["data"]["values"]["type"] == "Feature"