static BufferedImage lambdaMapLike mapPixels(IF1_IntToInt f, BufferedImage image) {
  if (image == null) null;
  int[] pixels = imageToIntPixels(image);
  for (int i = 0; i < pixels.length; i++)
    pixels[i] = f.get(pixels[i]);
  ret bufferedImage(pixels, imageSize(image));
}

static BufferedImage lambdaMapLike mapPixels(BufferedImage image, IF1_IntToInt f) {
  ret mapPixels(f, image);
}