static void printCachedPainterSize() {
  Class cp = getClass("sun.swing.CachedPainter");
  Map cacheMap = cast get(cp, "cacheMap");
  print("CachedPainter map size: " + l(cacheMap));
  for (O key : keys(cacheMap)) {
    O imageCache = cacheMap.get(key);
    int maxCount = cast get(imageCache, "maxCount");
    L entries = cast get(imageCache, "entries");
    print("  Key: " + key + ", entries: " + l(entries) + ", maxCount: " + maxCount);
  }
}

Began life as a copy of #1008239