@Override
    public Set<ApplicationId> getAllSuspendedApplications() {
        Set<ApplicationInstanceReference> refSet = statusService.getAllSuspendedApplications();
        return refSet.stream().map(OrchestratorUtil::toApplicationId).collect(toSet());
    }
@Test
    public void appliations_list_returns_empty_initially() {
        assertTrue(orchestrator.getAllSuspendedApplications().isEmpty());
    }