public bool IsLater(QuantityDate anOther)
 {
     return(Quantity_Date_IsLater4AE38D5E(Instance, anOther.Instance));
 }
 public QuantityPeriod Difference(QuantityDate anOther)
 {
     return(new QuantityPeriod(Quantity_Date_Difference4AE38D5E(Instance, anOther.Instance)));
 }