code: public static String getLocalizedMessage(PageContext pageContext,
                                               String key) {
          return getLocalizedMessage(pageContext, key, null, null);
      }
docs: Retrieves the localized message corresponding to the given key.
  <p> The given key is looked up in the resource bundle of the default
  I18N localization context, which is retrieved from the
  <tt>javax.servlet.jsp.jstl.fmt.localizationContext</tt> configuration
  setting.
  <p> If the configuration setting is empty, or the default I18N
  localization context does not contain any resource bundle, or the given
  key is undefined in its resource bundle, the string "???&lt;key&gt;???" is
  returned, where "&lt;key&gt;" is replaced with the given key.
  
  @param pageContext the page in which to get the localized message
  corresponding to the given key
  @param key         the message key
  @return the localized message corresponding to the given key