docs: public static void render(List<Contour> contours , int colors[] , BufferedImage out) {
  
  		colors = checkColors(colors,contours.size());
  
  		for( int i = 0; i < contours.size(); i++ ) {
  			Contour c = contours.get(i);
  			int color = colors[i];
  
  			for(Point2D_I32 p : c.external ) {
  				out.setRGB(p.x,p.y,color);
  			}
  		}
  	}