private void Apply(ShareClassCreated @event)
 {
     this.ticker = new Ticker(@event.Ticker);
     this.type   = ShareClassType.CreateFromString(@event.Type);
 }
 private void Apply(DocumentAssociatedWithShareclass @event)
 {
     this.shareClassAssociations.Add(
         new DocumentShareClassAssociation(@event.DocumentId, @event.ShareClassId,
             ShareClassType.CreateFromString(@event.ShareClassType)));
 }