in app/com/gu/memsub/promo/Promotion.scala [50:57]
def fromId(id: String): Option[CampaignGroup] = id match {
case DigitalPack.id => Some(DigitalPack)
case SupporterPlus.id => Some(SupporterPlus)
case TierThree.id => Some(TierThree)
case Newspaper.id => Some(Newspaper)
case GuardianWeekly.id => Some(GuardianWeekly)
case _ => None
}