static <A> PatchworkImage<A> patchworkBufferedImagesHorizontally(LPair<BufferedImage, A> images, O... _) {
  if (empty(images)) null;
  optPar int spacing = imageMergeSpacing();
  int w = intSum(mapMethod getWidth(images))+(l(images)-1)*spacing, h = intMax(mapMethod getHeight(images));
  new PatchworkImage<A> out;
  int x = 0;
  for (imageAndValue : images) {
    BufferedImage img = imageAndValue.a;
    int y = (h-img.getHeight())/2;
    out.addPatch(img, x, y, imageAndValue.p);
    x += img.getWidth() + spacing;
  }
  ret out;
}