/**
  * Method for copying the suitable instance variable from a <code>ReturnPath</code> object.
  *
  * @param obj Object used to define the instance variables which should be carried over to this
  *     object.
  * @exception DemoException thrown if there is a problem accessing the instance variables from the
  *     target objetct.
  */
 private void copyInstanceVariables(ReturnPath obj) throws DemoException {
   //
   // Instance variables defined in the PathId object.
   set_name(obj.get_name());
   set_startDate(obj.get_startDate());
   set_endDate(obj.get_endDate());
   set_dTime(obj.get_dTime());
   //
   // Instance variables defined in this object.
   this.returnDefinition = obj.get_returnDefinition();
   this.expectedReturnRate = obj.get_expectedReturnRate();
   this.volatility = obj.get_volatility();
 }