public static Option <TItem> ResolveAs <TItem>(this ITemplateMapping mapping, Item item) where TItem : IItem
{
if (mapping == null)
{
throw new ArgumentNullException(nameof(mapping));
}
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
return(mapping.Resolve(item).SomeWhen(i => i is TItem).Map(i => (TItem)i));
}
public IEnumerable <IItem> AncestorsAndSelf() => Ancestors().Concat(new[] { mapping.Resolve(ownerItem) }).ToArray();