private static void build(
out IList <Polygon> result,
out IList <Segment> dangles,
out IList <Segment> cuts)
{
Polyline polyline = new Polyline();
polyline.Paths = _sourcePaths;
PlanarGraph graph = PlanarGraph.Build(polyline, null);
graph.SetElementsEnabledState(true);
markDangles(graph);
getCutsAndDangles(graph, out dangles);
result = graph.BuildFaces(out cuts);
}