GeoJsonFeatureType.point ignores properties when serializing

[duzenko]

  String serialize() {
    assert(type != null, "The feature type can not be null for serialization");
    String featStr;
    switch (type) {
      case GeoJsonFeatureType.point:
        final geom = geometry as GeoJsonPoint;
        featStr = geom.serializeFeature();
        break;
      case GeoJsonFeatureType.multipoint:
        final geom = geometry as GeoJsonMultiPoint;
        featStr = geom.serializeFeature();
        break;
      case GeoJsonFeatureType.line:
        final geom = geometry as GeoJsonLine;
        featStr = geom.serializeFeature();
        break;
      case GeoJsonFeatureType.multiline:
        final geom = geometry as GeoJsonMultiLine;
        featStr = geom.serializeFeature(properties);
        break;
      case GeoJsonFeatureType.polygon:
        final geom = geometry as GeoJsonPolygon;
        featStr = geom.serializeFeature(properties);
        break;
      case GeoJsonFeatureType.multipolygon:
        final geom = geometry as GeoJsonMultiPolygon;
        featStr = geom.serializeFeature();
        break;
    }
    return featStr;
  }

You can see that only multiline and polygon make use of properties.
I do need them at least for point