@Override
    public Set<OpenstackVtap> getVtapsByDeviceId(DeviceId deviceId) {
        return store.getVtapsByDeviceId(deviceId);
    }
@Test
    public void testGetDeviceIdsFromVtap() {
        assertTrue(ERR_NOT_FOUND, target.getVtapsByDeviceId(DEVICE_ID_3).contains(VTAP_2));
        assertTrue(ERR_NOT_FOUND, target.getVtapsByDeviceId(DEVICE_ID_4).contains(VTAP_2));
    }