private static IEnumerable <Notifiable> GetModels(Notifiable aggregate)
{
GuardAgainst.Null(aggregate, nameof(aggregate));
var models = aggregate
.GetType()
.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly)
.Where(p => typeof(Notifiable).IsAssignableFrom(p.PropertyType))
.Select(p => (Notifiable)p.GetValue(aggregate))
.ToList();
models.Insert(0, aggregate);
return(models);
}