private void LogState()
        {
            IBoiler boiler = _repo.Retrieve();
            BoilerStatus bs = new BoilerStatus(boiler);
            bs.LoggedDate = DateTime.Now;
            _logger.Save(bs);

        }
        private void LogState()
        {
            IBoiler      boiler = _repo.Retrieve();
            BoilerStatus bs     = new BoilerStatus(boiler);

            bs.LoggedDate = DateTime.Now;
            _logger.Save(bs);
        }