public String getTravel(int idx) {
   WorkOrderItemizedServiceStr woISS = (WorkOrderItemizedServiceStr) itemizedServiceStr.get(idx);
   if (woISS == null) return "";
   return woISS.getTravel();
 }
 public void setTravel(int idx, String pVal) {
   WorkOrderItemizedServiceStr woISS = (WorkOrderItemizedServiceStr) itemizedServiceStr.get(idx);
   if (woISS == null) return;
   woISS.setTravel(pVal);
 }