code: private MessageResources lookupDefaultStrutsBundle() {
          Object value = _servletRequest.getAttribute(Globals.MESSAGES_KEY);
          if(value instanceof MessageResources)
              return (MessageResources)value;
          else {
              if(value != null)
                  LOGGER.warn("Can not resolve the default module bundle."
                      + "  The object resolved from the request is of type "
                      + value.getClass().toString());
              return null;
          }
      }
docs: Lookup the "default" resource bundle for the current Struts module.
  
  @return a MessageResources object if a "default" bundle exists.
  <code>null</code> otherwise