private IEvent Map(MeterRegistered e)
        {
            var retVal = new MonitorRegistered(e.MeterId, e.PostalCode, e.HouseNumber, e.ActivationCode);

            retVal.Timestamp = e.Timestamp;
            return(retVal);
        }
        private EventWrapper Transformer(MeterRegistered e, EventWrapper original)
        {
            var newStreamId = ReplaceMeterWithMonitor(original.StreamInfo.Id);
            var newEntityId = ReplaceMeterWithMonitor(e.MeterId);
            var newEventId  = $"{newStreamId}:{original.StreamInfo.Version}";

            var newEvent = new MonitorRegistered(newEntityId, e.PostalCode, e.HouseNumber, e.ActivationCode);

            newEvent.Timestamp = e.Timestamp;

            var expectedValue = CreateEventWrapper(newEventId, newStreamId, original.StreamInfo.Version,
                                                   newEvent);

            return(expectedValue);
        }