partial         void CopyExtraPropertiesToClone(TimeTrackingConfiguration clone, bool includeLocalProperties);
 public TimeTrackingConfiguration Clone(bool includeLocalProperties)
 {
     var c = new TimeTrackingConfiguration
             {
                 DaysPerWeek = DaysPerWeek,
                 HoursPerDay = HoursPerDay,
             };
     CopyExtraPropertiesToClone(c, includeLocalProperties);
     return c;
 }