static long dm_moduleSize2(O mod) {
  new guessDeepObjectSize_recursive_Data data;
  data.realmsToIgnore = lithashset(getRealm(dm_os()));
  data.seen.add(javax());
  O module = dm_getModule(mod);
  data.stack.add(getMainClass(module));
  ret guessDeepObjectSize_recursive(data, module);
}