/// <summary>
/// Инициализирует медиатор с пустыми коллекциями обработчиков
/// <see cref="IEnumerable{T}" />.
/// </summary>
public Mediator(IPreProcessorService preProcessorService)
{
_preProcessorService = preProcessorService.ThrowIfNull(nameof(preProcessorService));
_handlers = new ConcurrentBag <IMessageHandler>();
_asyncHandlers = new ConcurrentBag <IMessageHandlerAsync>();
}
