how to save a pastebin
/**
     * Save downloadable files.
     *
     * @param WC_Product $product    Product instance.
     * @param array      $downloads  Downloads data.
     *
     * @return WC_Product
     */
    protected function save_downloadable_files( $product, $downloads ) {
        $files = [];
        foreach ( $downloads as $key => $file ) {
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            if ( empty( $file['file'] ) ) {
                continue;
            }

            $download = new WC_Product_Download();
            $download->set_id( $key );
            $download->set_name( $file['name'] ? $file['name'] : wc_get_filename_from_url( $file['file'] ) );
            $download->set_file( apply_filters( 'woocommerce_file_download_path', $file['file'], $product, $key ) );
            $files[] = $download;
        }
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        $product->set_downloads( $files );

        return $product;
    }
how to save a pastebin