private IEnumerable <Sitecore.Data.Items.Item> GetChildCategories(Sitecore.Data.Items.Item parentCategory)
{
if (!parentCategory.IsDerived(Templates.Category.ID))
{
return(Enumerable.Empty <Sitecore.Data.Items.Item>());
}
var childCategories = GetChildCategoriesFromIndex(parentCategory.ID);
if (!childCategories.Any())
{
return(GetChildCategories(parentCategory.Parent));
}
return(childCategories);
}