// Test with zero
        searchRenderData.setCurrentPageNumber(0);
        assertEquals(0, searchRenderData.getCurrentPageNumber());

        // Test with positive values
        searchRenderData.setCurrentPageNumber(1);
        assertEquals(1, searchRenderData.getCurrentPageNumber());

        searchRenderData.setCurrentPageNumber(999);
        assertEquals(999, searchRenderData.getCurrentPageNumber());

    public HtmlResponse list(final OptionalThing<Integer> pageNumber, final SearchForm form) {
        pageNumber.ifPresent(num -> {
            dataConfigPager.setCurrentPageNumber(pageNumber.get());
        }).orElse(() -> {
            dataConfigPager.setCurrentPageNumber(0);
        });
        return asHtml(path_AdminDataconfig_AdminDataconfigJsp).renderWith(data -> {
            searchPaging(data, form);
        });
    }

    public HtmlResponse list(final OptionalThing<Integer> pageNumber, final SearchForm form) {
        pageNumber.ifPresent(num -> {
            fileConfigPager.setCurrentPageNumber(pageNumber.get());
        }).orElse(() -> {
            fileConfigPager.setCurrentPageNumber(0);
        });
        return asHtml(path_AdminFileconfig_AdminFileconfigJsp).renderWith(data -> {
            searchPaging(data, form);
        });
    }

    public HtmlResponse list(final OptionalThing<Integer> pageNumber, final SearchForm form) {
        pageNumber.ifPresent(num -> {
            webConfigPager.setCurrentPageNumber(pageNumber.get());
        }).orElse(() -> {
            webConfigPager.setCurrentPageNumber(0);
        });
        return asHtml(path_AdminWebconfig_AdminWebconfigJsp).renderWith(data -> {
            searchPaging(data, form);
        });
    }