1<?php
2
3namespace PhpOffice\PhpSpreadsheet\Writer\Ods;
4
5use PhpOffice\PhpSpreadsheet\Spreadsheet;
6
7class Thumbnails extends WriterPart
8{
9    /**
10     * Write Thumbnails/thumbnail.png to PNG format.
11     *
12     * @param Spreadsheet $spreadsheet
13     *
14     * @return string XML Output
15     */
16    public function writeThumbnail(Spreadsheet $spreadsheet = null)
17    {
18        return '';
19    }
20}
21