Question - Looking for the equivalent to "Courier"

[274188A]

Moving off depreciated MediatR.Courier.DependencyInjection

What is the alternative to what was MediatRCourier on MediatR.Courier.DependencyInjection" Version="5.0.0

Sample code:

{
    public static IServiceCollection AddNotifications(this IServiceCollection services)
    {
        // Add mediator processing of notifications
        var assemblies = AppDomain.CurrentDomain.GetAssemblies();
        services
            .AddMediatR(assemblies)
            .AddCourier(assemblies)
            .AddTransient<INotificationPublisher, NotificationPublisher>();

        // Register handlers for all INotificationMessages
        foreach (var eventType in assemblies
            .SelectMany(a => a.GetTypes())
            .Where(t => t.GetInterfaces().Any(i => i == typeof(INotificationMessage))))
        {
            services.AddSingleton(
                typeof(INotificationHandler<>).MakeGenericType(
                    typeof(NotificationWrapper<>).MakeGenericType(eventType)),
                serviceProvider => serviceProvider.GetRequiredService(typeof(MediatRCourier)));
        }

        return services;
    }
}

TIA!