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<?php namespace PhpOffice\PhpSpreadsheet\Writer\Ods; use PhpOffice\PhpSpreadsheet\Spreadsheet; class Mimetype extends WriterPart { /** * Write mimetype to plain text format. * * @param Spreadsheet $spreadsheet * * @return string XML Output */ public function write(?Spreadsheet $spreadsheet = null) { return 'application/vnd.oasis.opendocument.spreadsheet'; } }