sS renderSizesOfCreatorCacheVars() {
  new L<S> out;
  for (S var, int size : sizesOfCreatorCacheVars()) {
    O cache = getCreator(var);
    Int max = null;
    if (cache cast Map) max = maxSizeOfMRUCache(cache);
    out.add(size
      + (max != null ? "/" + max : "") + ": " + var);
  }
  ret lines(out);
}