public override void Handle(IDemographicUpdated command)
{
var existingDemographic = _demographicsRepository.CheckDemographicByExternalRef(command.ExternalRef);
existingDemographic.Update(command.Name, command.ShortName, command.DisplayOrder, command.Gameplan);
_demographicsRepository.Update(existingDemographic);
_demographicsRepository.SaveChanges();
}