/**
  * Called on request from the UI to return to the previous page.
  *
  * @param event Request Invocation Event.
  */
 @SuppressWarnings("unused")
 public void handleButton3Request(RequestInvocationEvent event) {
   backTrail();
   try {
     String name = (String) getPageSessionAttribute(SAVE_VB_NAME);
     ViewBean vb = getViewBean(Class.forName(name));
     passPgSessionMap(vb);
     vb.forwardTo(getRequestContext());
   } catch (ClassNotFoundException e) {
     debug.warning("AbstractAuditViewBean.handleButton3Request:", e);
   }
 }