public function getCustomCss() {
        // Prepare the paths
        $base_url = $this->storeManager->getStore()->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA);
        $file_path = $this->getValue(
            'payment/checkout_com/checkout_com_base_settings/custom_css',
            $this->storeManager->getStore()
        );

        return $base_url . 'checkout_com/' . $file_path;
    }