Who calls INotificationHandlers<xNotification>?

[1304654]

I would like to know how the notification handlers are executed. I was see the DomainEventsDispatcher that has:

 foreach (var domainEvent in domainEvents)
            {
                await _mediator.Publish(domainEvent);
            }

But no NotificationHandlers listens for IDomainEvent.

All NotificationHandlers listen for DomainNotificationBase. So who throws DomainNotificationBases like MemberSubscriptionExpirationDateChangedNotification through the bus? For the corresponding NotificationHandler to be executed.