private static void RecalcTypeTrees <T>(TypeSelector <T> selector, Dictionary <Type, List <Pair> > group) where T : class
{
var validDefaults = group[typeof(T)];
selector.Clear();
foreach (var entry in validDefaults)
{
var att = entry.Item1;
var ist = Activator.CreateInstance(entry.Item2);
selector.AddValue(att.AssociatedType, att.UseInChildren, (T)ist);
}
}