@Override
    public OpenstackNode node(String hostname) {
        return osNodeStore.node(hostname);
    }
@Test
    public void testGetNodeByDeviceId() {
        assertTrue(ERR_NOT_FOUND, Objects.equals(
                target.node(GATEWAY_1_INTG_DEVICE.id()), GATEWAY_1));
        assertTrue(ERR_NOT_FOUND, Objects.equals(
                target.node(GATEWAY_1.ovsdb()), GATEWAY_1));
    }