@Override
  @Reference(
      cardinality = ReferenceCardinality.MULTIPLE,
      policy = ReferencePolicy.DYNAMIC,
      policyOption = ReferencePolicyOption.GREEDY,
      target = "(operation.mode=EMBEDDED)")
  protected void addSettingsContributor(SettingsContributor settingsContributor) {

    super.addSettingsContributor(settingsContributor);
  }
  @Override
  public void close() {
    super.close();

    if (_node == null) {
      return;
    }

    _node.close();

    _node = null;
  }
 @Override
 @Reference(unbind = "-")
 public void setIndexFactory(IndexFactory indexFactory) {
   super.setIndexFactory(indexFactory);
 }
  @Override
  protected void removeSettingsContributor(SettingsContributor settingsContributor) {

    super.removeSettingsContributor(settingsContributor);
  }