page.setNextPage(cycle.getPage().getPageName());
page.setCallback(new PageCallback(this));
    public void addGateway(IRequestCycle cycle) {        EditGateway page = (EditGateway) cycle.getPage(EditGateway.PAGE);        page.setGatewayId(null);        page.setRuleId(null);        page.setNextPage(cycle.getPage().getPageName());        cycle.activate(page);    }