@Override
    public String builder(final String paramName, final ServerWebExchange exchange) {
        List<HttpCookie> cookies = exchange.getRequest().getCookies().get(paramName);
        if (CollectionUtils.isEmpty(cookies)) {
            return "";
        }
        return cookies.get(0).getValue();
    }
@Test
    public void testBuilder() {
        assertEquals("", parameterData.builder("invalid-cookie-name", exchange));
        assertEquals("cookie-value", parameterData.builder("cookie-name", exchange));
    }