private void AddAgencyIdentifier(AgencyIdentifierDto agencyIdentifierDto, Agency agency)
{
var agencyIdentifierType = _mappingHelper.MapLookupField <AgencyIdentifierType> (agencyIdentifierDto.AgencyIdentifierType);
var addIdentifier =
new AgencyIdentifierBuilder().WithAgencyIdentifierType(agencyIdentifierType).WithIdentifierNumber(
agencyIdentifierDto.IdentifierNumber).WithEffectiveDateRange(
new DateRange(agencyIdentifierDto.StartDate, agencyIdentifierDto.EndDate)).Build();
agency.AddIdentifier(addIdentifier);
}