public static ContentElementViewModel CreateContentElement(this AddonElementData data, object model = null)
 {
     if (data.Type.IsSubclassOf(typeof(ContentElementAddon)))
     {
         return(ContentElementAddon.CreateFromModel(data.Type, model));
     }
     if (!(data.Attribute is ContentAddonElementAttribute a) || a.ViewModelType == null)
     {
         return(null);
     }
     if (model is null)
     {
         return((ContentElementViewModel)Activator.CreateInstance(a.ViewModelType));
     }
     return((ContentElementViewModel)Activator.CreateInstance(a.ViewModelType, model));
 }
 internal ContentElementAddonModel(ContentElementAddon typeProvider)
 {
     _typeProvider = typeProvider;
 }