docs: public List<List<GeoPoint>> getHoles(){
  		List<List<GeoPoint>> result = new ArrayList<List<GeoPoint>>(mHoles.size());
  		for (LinearRing hole:mHoles){
  			result.add(hole.getPoints());
  			//TODO: completely wrong:
  			// hole.getPoints() doesn't return a copy but a direct handler to the internal list.
  			// - if geodesic, this is not the same points as the original list.
  		}
  		return result;
  	}