protected async Task ProcessCommand(LeaveEvento command)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
var evento = (await NonEventSourceRepository.GetEvent(command.Id)).ToDomainEvent();
evento.LeaveEvento(command.ParticipantId);
await NonEventSourceRepository.LeaveEvent(evento.Id, command.ParticipantId);
}
