partial         void CopyExtraPropertiesToClone(TypedId clone, bool includeLocalProperties);
 public TypedId Clone(bool includeLocalProperties)
 {
     var c = new TypedId
             {
                 Id = Id,
                 Type = Type,
             };
     CopyExtraPropertiesToClone(c, includeLocalProperties);
     return c;
 }