@Order(2000)
public class ContainerMenu extends AbstractMenu {
  @Override
  protected String getConfiguredText() {
    return "Container";
  }

  @Order(1000)
  public class SingleMenu extends AbstractMenu {
    @Override
    protected String getConfiguredText() {
      return "Single child";
    }

    @Override
    protected Set<? extends IMenuType> getConfiguredMenuTypes() {
      return CollectionUtility.hashSet(TableMenuType.SingleSelection);
    }

    @Override
    protected void execAction() {
      MessageBoxes.createOk().withBody("SingleSelection").show();
    }
  }

  @Order(2000)
  public class MultiMenu extends AbstractMenu {
    @Override
    protected String getConfiguredText() {
      return "Multi child";
    }

    @Override
    protected Set<? extends IMenuType> getConfiguredMenuTypes() {
      return CollectionUtility.hashSet(TableMenuType.MultiSelection);
    }

    @Override
    protected void execAction() {
      MessageBoxes.createOk().withBody("MultiSelection").show();
    }
  }
}

@Order(3000)
public class SingleMenu extends AbstractMenu {
  @Override
  protected String getConfiguredText() {
    return "Single root";
  }

  @Override
  protected Set<? extends IMenuType> getConfiguredMenuTypes() {
    return CollectionUtility.hashSet(TableMenuType.SingleSelection);
  }

  @Override
  protected void execAction() {
    MessageBoxes.createOk().withBody("SingleSelection").show();
  }
}

@Order(4000)
public class MultiMenu extends AbstractMenu {
  @Override
  protected String getConfiguredText() {
    return "Multi root";
  }

  @Override
  protected Set<? extends IMenuType> getConfiguredMenuTypes() {
    return CollectionUtility.hashSet(TableMenuType.MultiSelection);
  }

  @Override
  protected void execAction() {
    MessageBoxes.createOk().withBody("MultiSelection").show();
  }
}