static new ThreadLocal<RGB> ocr_findOutApproximateHeightOfTaskBar_v1_dominantColor;

static int ocr_findOutApproximateHeightOfTaskBar_v1(O... _) {
  int grid = optPar grid(_, 10);
  RGBImage screenshot = optParOr screenshot(_, () -> shootScreenRGB());
  L<RGBImage> slices = rgbImageVerticalSlices(grid, shootScreenRGB());
  L<Int> dominantColors = map dominant332color(slices);
  //showImage(mergeImagesVertically(map rgbSingleColorCube(map rgbFrom332(dominantColors))));
  int idx = indexOfLastChange(dominantColors);
  if (idx < 0) ret 0;
  ocr_findOutApproximateHeightOfTaskBar_v1_dominantColor.set(rgbFrom332(last(dominantColors)));
  int h = 0;
  for (; idx < l(slices); idx++)
    h += slices.get(idx).getHeight();
  ret h;
}