// returns true if change
sbool _cSmartSetField(Concept c, S field, O value) ctex {
  Field f = setOpt_findField(c.getClass(), field);
  if (f != null && value != null) {
    Class type = primitiveToBoxedTypeOpt(f.getType());
    if (type == Int.class && !value instanceof Int) {
      if (!setField_trueIfChanged(f, c, toInt(trimIfString(value)))) false;
      if (!isTransient(f)) c.change();
      true;
    }
  }
  ret _csetField(c, field, value);
}