code: private static boolean polygonOverlapsPolygon_(Polygon polygon_a,
  			Polygon polygon_b, double tolerance,
  			ProgressTracker progress_tracker) {
  		// Quick rasterize test to see whether the the geometries are disjoint,
  		// or if one is contained in the other.
  		int relation = tryRasterizedContainsOrDisjoint_(polygon_a, polygon_b,
  				tolerance, false);
  
  		if (relation == Relation.disjoint || relation == Relation.contains
  				|| relation == Relation.within)
  			return false;
  
  		return polygonOverlapsPolygonImpl_(polygon_a, polygon_b, tolerance,
  				progress_tracker);
  	}
docs: Returns true if polygon_a overlaps polygon_b.