static long guessObjectSizeWithout(Cl objectsToIgnore, O o) {
  new guessDeepObjectSize_recursive_Data data;
  data.seen.addAll(objectsToIgnore);
  ret guessDeepObjectSize_recursive(data, o);
}

static long guessObjectSizeWithout(O o, Cl objectsToIgnore) {
  ret guessObjectSizeWithout(objectsToIgnore, o);
}

Began life as a copy of #1018919