@Override
    public boolean isReachable(DeviceId deviceId) {
        SnmpDevice snmpDevice = controller.getDevice(deviceId);
        if (snmpDevice == null) {
            log.warn("BAD REQUEST: the requested device id: "
                             + deviceId.toString()
                             + "  is not associated to any SNMP Device");
            return false;
        }
        return snmpDevice.isReachable();
    }
@Test
    public void eventNotRelevant() {
        assertFalse("Event should not be relevant", provider.cfgLister.isRelevant(deviceAddedIrrelevantEvent));
        assertFalse("Device should not be reachable", provider.isReachable(wrongDeviceId));
    }