public SortItem(NodeLocation location, object sortKey, Ordering ordering, NullOrdering nullOrdering) : base(location)
{
this.Ordering = ordering;
this.NullOrdering = nullOrdering;
this.SortKey = sortKey;
}
public SortItem(object sortKey, Ordering ordering, NullOrdering nullOrdering) : this(null, sortKey, ordering, nullOrdering)
{
}
