scope agiBlue_chessPieceImages_loadedMultiMap.

static ThreadLocal<MultiMap<S, BufferedImage>> #cache = new ThreadLocal;

static MultiMap<S, BufferedImage> agiBlue_chessPieceImages_loadedMultiMap() {
  ret agiBlue_chessPieceImages_loadedMultiMap(null);
}

static MultiMap<S, BufferedImage> agiBlue_chessPieceImages_loadedMultiMap(Bool lightSquares) {
  if (cache! != null) ret cache!;
  MultiMap<S, BufferedImage> mm = ciMultiMap();
  for (S imageID, piece : unpair chessPieceImagesFromAGIBlue(lightSquares)) {
    mm.put(piece, loadImage2(imageID));
  }
  ret mm;
}