public static SimpleFeature createFakeOsmFeature(Geometry latLonGeometry, Map<String, Object> tags, String source,
    String sourceLayer, long id, List<OsmReader.RelationMember<OsmRelationInfo>> relations) {
    return createFakeOsmFeature(latLonGeometry, tags, source, sourceLayer, id, relations, null);
  }
Returns a new feature with OSM relation info. Useful for setting up inputs for OSM unit tests.
planetiler-core/src/main/java/com/onthegomap/planetiler/reader/SimpleFeature.java