mall/librarys/phpexcel/PHPExcel/Writer/OpenDocument/Thumbnails.php

<?php
/**
 * 重庆赤晓店信息科技有限公司
 * https://www.chixiaodian.com
 * Copyright (c) 2023 赤店商城 All rights reserved.
 */
class PHPExcel_Writer_OpenDocument_Thumbnails extends PHPExcel_Writer_OpenDocument_WriterPart
{
    /**
     * Write Thumbnails/thumbnail.png to PNG format
     *
     * @param   PHPExcel                   $pPHPExcel
     * @return  string                     XML Output
     * @throws  PHPExcel_Writer_Exception
     */
    public function writeThumbnail(PHPExcel $pPHPExcel = null)
    {
        return '';
    }
}