@Test
public void startSeveralTimes() throws Exception {

    // This test simulates the situation where the root actor of a Ditto service restarts several times.
    // GIVEN: Many blocked-namespaces objects were obtained in the same actor system.
    final Supplier<BlockedNamespaces> blockedNamespacesSupplier = () -> BlockedNamespaces.of(actorSystem);
    for (int i = 0; i < 10; ++i) {
        blockedNamespacesSupplier.get();
    }
    // WHEN: Another blocked-namespaces object is obtained.
    // THEN: It fulfills its function.
    testCRUD(blockedNamespacesSupplier.get(), actorSystem);
}