@Override
 public void handleCancellationFailureEvent(HistoryEvent event) {
   switch (state) {
     case CANCELLATION_DECISION_SENT:
       stateHistory.add("handleCancellationFailureEvent");
       state = DecisionState.INITIATED;
       stateHistory.add(state.toString());
       break;
     default:
       super.handleCancellationFailureEvent(event);
   }
 }