@Override
    public Host getHost(HostId hostId) {
        checkPermission(HOST_READ);
        checkNotNull(hostId, HOST_ID_NULL);
        return store.getHost(hostId);
    }
@Test
    public void hostVanishedIPv6() {
        detect(HID3, MAC3, VLAN1, LOC1, IP3);
        providerService.hostVanished(HID3);
        validateEvents(HOST_ADDED, HOST_REMOVED);

        assertNull("host should have been removed", mgr.getHost(HID3));
    }