code: public function execute()
  	{
  		parent::execute();
  
  		$sheet = $this->getExcel()->getActiveSheet();
  
  		$sheet->getStyle('A1')->getFont()->setBold(true);
  		$sheet->getStyle('B1')->getFont()->setBold(true);
  		$sheet->getStyle('C1')->getFont()->setBold(true);
  		$sheet->getStyle('D1')->getFont()->setBold(true);
  		$sheet->getStyle('E1')->getFont()->setBold(true);
  
  		// auto size
  		for ($column = 'A'; $column != 'F'; $column++)
  		{
  			$sheet->getColumnDimension($column)->setAutoSize(true);
  		}
  
  		$this->getWriter()->save($this->getArguments()[1]);
  
  		return true;
  	}
docs: (non-PHPdoc)
  @see \DasRed\Translation\Command\Executor\Log\ToCsv::execute()