docs: @Override
    public final synchronized void handleDataChanged() throws Exception {
      this.i18nWebStoreList = null;
      this.i18nCatalogs = null;
      this.currRates = null;
      this.dlvMts = null;
      this.logger.info(null, HndlTradeVarsRequest.class,
        "I18N changes are handled.");
    }