src/main/java/org/efaps/ui/wicket/components/links/ContentContainerLink.java
@Override
    public void onClick()
    {
        Instance instance = null;
        final AbstractUIField uiField = super.getModelObject();
        if (uiField.getInstanceKey() != null) {
            Menu menu = null;
            try {
                instance = uiField.getInstance();
                menu = Menu.getTypeTreeMenu(instance.getType());
            } catch (final EFapsException e) {
                throw new RestartResponseException(new ErrorPage(e));
            }
            if (menu == null) {
                final Exception ex = new Exception("no tree menu defined for type " + instance.getType().getName());
                throw new RestartResponseException(new ErrorPage(ex));
            }

            Page page;
            try {
                page = new ContentContainerPage(menu.getUUID(), uiField.getInstanceKey(),
                                getPage() instanceof StructurBrowserPage);
            } catch (final EFapsException e) {
                page = new ErrorPage(e);
            }
            this.setResponsePage(page);
        }
    }
@Override
    public void onClick()
    {
        Instance instance = null;
        final AbstractUIField uiField = super.getModelObject();
        if (uiField.getInstanceKey() != null) {
            Menu menu = null;
            try {
                instance = uiField.getInstance();
                menu = Menu.getTypeTreeMenu(instance.getType());
            } catch (final EFapsException e) {
                throw new RestartResponseException(new ErrorPage(e));
            }
            if (menu == null) {
                final Exception ex = new Exception("no tree menu defined for type " + instance.getType().getName());
                throw new RestartResponseException(new ErrorPage(ex));
            }

            Page page;
            try {
                page = new ContentContainerPage(menu.getUUID(), uiField.getInstanceKey(),
                                getPage() instanceof StructurBrowserPage);
            } catch (final EFapsException e) {
                page = new ErrorPage(e);
            }
            this.setResponsePage(page);
        }
    }
Method is executed on click.