protected function createXlWorksheetsFolder()
    {
        $this->xlWorksheetsFolder = $this->createFolder($this->xlFolder, self::WORKSHEETS_FOLDER_NAME);
        return $this;
    }
protected function createXlWorksheetsFolder()
    {
        $this->xlWorksheetsFolder = $this->createFolder($this->xlFolder, self::WORKSHEETS_FOLDER_NAME);
        return $this;
    }
protected function createXlWorksheetsFolder ( ) { $ this -> xlWorksheetsFolder = $ this -> createFolder ( $ this -> xlFolder , self :: WORKSHEETS_FOLDER_NAME ) ; return $ this ; }
Creates the "worksheets" folder under the "xl" folder

@return FileSystemHelper
@throws \Box\Spout\Common\Exception\IOException If unable to create the folder
Creates the worksheets folder under the xl folder