code: private void setEventType(short eventType) {
        if (eventType != ADDED && eventType != REMOVED && eventType != CHANGED) {
           throw new IllegalArgumentException("Invalid eventType code "
              + eventType);
        }
  
        this.eventType = eventType;
     }
docs: @param eventType The eventType to set.
  
  @uml.property name="eventType"