static boolean isProviderEnabled(Configuration configuration, String serviceName) {
        return SecurityOptions.forProvider(configuration, serviceName)
                .get(DELEGATION_TOKEN_PROVIDER_ENABLED);
    }
@Test
    public void isProviderEnabledMustGiveBackTrueByDefault() {
        Configuration configuration = new Configuration();

        assertTrue(DefaultDelegationTokenManager.isProviderEnabled(configuration, "test"));
    }