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