private void When(DistributionOwnersAdded @event) =>
 Owners.AddRange(@event.Owners);
 /// <inheritdoc />
 public async Task Handle(DistributionOwnersAdded @event, CancellationToken cancellationToken)
 {
     await Update(@event, distribution => distribution.Owners.AddRange(@event.Owners), cancellationToken);
 }