@Test
    public void blank_entityId_throws_IAE() {
        index.index(Collections.emptyList());

        Assertions.assertThrows(IllegalArgumentException.class, () -> {
            index.isDiscoverable(EntityType.PLAN, "test", "", "a", Set.of(DiscoverabilityLevel.ANONYMOUS));
        });
    }
@author Marc Savy {@literal <marc@blackparrotlabs.io>}
manager/api/security/src/test/java/io/apiman/manager/api/security/impl/IndexedDiscoverabilitiesPlanTest.java