func (builder *BroadcastSituationExchangeBuilder) buildAffectedLine(affect model.Affect, ptSituationElement *siri.SIRIPtSituationElement, delivery *siri.SIRISituationExchangeDelivery) (*siri.AffectedLine, bool) {
    affect, _ = affect.(*model.AffectedLine)
    line, ok := builder.partner.Model().Lines().Find(model.LineId(affect.GetId()))
    if !ok {
        logger.Log.Debugf("Unknown Line %s", affect.GetId())