LOG.debug("returning instance: " + $instance);
LOG.debug("returning instance: " + simpleString($instance));
  public final PersistentBean getInstance() {    LOG.debug("instance requested; id = " + getId());    if ($instance == null) {      LOG.debug("instance is not cached");      if (getId() != null) {        loadInstance();      }      else {        createInstance();      }    }    else {      LOG.debug("returning instance from cache");    }    LOG.debug("returning instance: " + $instance);    return $instance;  }