code: protected static boolean isMissingUserDefaultMessages(PageContext pageContext)
      {
          return isMissingUserDefaultMessages(RequestUtils.getModuleConfig(pageContext))
                 && pageContext.getRequest().getAttribute(Globals.MESSAGES_KEY) == null;
      }
docs: Tell whether the given Struts module has no default message bundle defined.
  @return <code>true</code> if the given Struts module has no user-specified default message bundle.