Using Squaring class of the algo module

[anarchz]

Hello!
I've tried to use class Squaring of the algo module for building squaring from .geojson file, but doesn't understand where I made a mistake. I would appreciate if you could help me.

Collection<Feature> units = GeoData.getFeatures(inFile);
Collection<Geometry> modyfiyedGeometry = new ArrayList<>();
if (inFile != null && !"".equals(inFile)) {
    for (Feature feature : units) {
        Collection<Polygon> polygons = JTSGeomUtil.getPolygons(feature.getGeometry());
        for (Polygon p : polygons) {
            modyfiyedGeometry.add(Squarring.get(p));
        }
    }
}

units = FeatureUtil.geometriesToFeatures(modyfiyedGeometry);
GeoData.save(units, outFile, GeoData.getCRS(inFile));