code: private void initMessageKeyHandler(Element element) {
  
          String className = element.attributeValue(APPINFO_ATTR_CLASS);
          String configuration = element.attributeValue(APPINFO_ATTR_CONFIGURATION);
          try {
              Object messageKeyHandler = Class.forName(className).getConstructor(String.class).newInstance(configuration);
              m_messageKeyHandler = (CmsMultiMessages.I_KeyFallbackHandler)messageKeyHandler;
          } catch (Exception e) {
              LOG.error(e.getLocalizedMessage(), e);
          }
      }
docs: Initializes the message key fall back handler.<p>
  
  @param element the XML element node