code: @Override
      public String key(String key, Object[] args) {
  
          if (hasConfigValue(key)) {
              return getConfigValue(key, args);
          }
          return m_messages.key(key, args);
      }
docs: Returns the localized resource String from the configuration file, if not found or set from the resource bundle.<p>
  
  @see org.opencms.i18n.CmsMessages#key(java.lang.String, java.lang.Object[])