How to use

visitChildren

method

in

org.apache.wicket.markup.html.panel.Panel

private List<Panel> buildPanelsForCategories(final MenuHierarchy menu, final Node subject, String[] categories) throws RepositoryException {
  List<Panel> list = new ArrayList<>();
  for (final String category : categories) {
    List<Panel> panels = buildPanelsForCategory(subject, category);
    for (Panel panel : panels) {
      panel.visitChildren(Panel.class, new MenuVisitor(menu, category));
      panel.setVisible(false);
      list.add(panel);
    }
  }
  return list;
}

panel.visitChildren(AbstractField.class, validator);
getPage().remove(panel);