@VisibleForTesting
    static boolean isInPriorNetwork(String ip) {
        ip = ip.trim();
        for (String cidr : PRIORITY_CIDRS) {
            cidr = cidr.trim();
            IPAddressString network = new IPAddressString(cidr);
            IPAddressString address = new IPAddressString(ip);
            if (network.contains(address)) {
                return true;
            }
        }
        return false;
    }
@Test
    public void cidrTest2() {
        List<String> priorityCidrs = FrontendOptions.PRIORITY_CIDRS;
        priorityCidrs.add("2408:4001:258::/48");

        FrontendOptions frontendOptions = new FrontendOptions();
        boolean inPriorNetwork = frontendOptions.isInPriorNetwork("2408:4001:258:3780:f3f4:5acd:d53d:fa23");
        Assert.assertEquals(true, inPriorNetwork);
    }