@Override
        public void processFeature(SourceFeature source, FeatureCollector features) {
          features.point("stations")
            .setZoomRange(0, 14)
            .setAttr("name", source.getString("name"));
        }
In-memory tests with fake data and profiles to ensure all features work end-to-end.
planetiler-core/src/test/java/com/onthegomap/planetiler/PlanetilerTests.java