partial         void CopyExtraPropertiesToClone(Link clone, bool includeLocalProperties);
 public Link Clone(bool includeLocalProperties)
 {
     var c = new Link
             {
                 Href = Href,
                 Inline = Inline,
                 Rel = Rel,
                 Title = Title,
             };
     CopyExtraPropertiesToClone(c, includeLocalProperties);
     return c;
 }