protected function createMimetypeFile()
    {
        $this->createFileWithContents($this->rootFolder, self::MIMETYPE_FILE_NAME, self::MIMETYPE);
        return $this;
    }
protected function createMimetypeFile()
    {
        $this->createFileWithContents($this->rootFolder, self::MIMETYPE_FILE_NAME, self::MIMETYPE);
        return $this;
    }
protected function createMimetypeFile ( ) { $ this -> createFileWithContents ( $ this -> rootFolder , self :: MIMETYPE_FILE_NAME , self :: MIMETYPE ) ; return $ this ; }
Creates the "mimetype" file under the root folder

@return FileSystemHelper
@throws \Box\Spout\Common\Exception\IOException If unable to create the file
Creates the mimetype file under the root folder