protected function getVatFreeProductsOptions()
    {
        return array(
            PluginConfig::VatFreeProducts_Both => $this->t('option_vatFreeProducts_1'),
            PluginConfig::VatFreeProducts_No => $this->t('option_vatFreeProducts_2'),
            PluginConfig::VatFreeProducts_Only => $this->t('option_vatFreeProducts_3'),
        );
    }