PhpSpreadsheet - How to get boolen value

I use PhpSpreadsheet to get value from an Excel file, but I cannot get boolean value.

Using code:

    $objPHPExcel = new PHPExcel();              
    $objPHPExcel = $objReader->load($uploadfile);           
    $sheet = $objPHPExcel->getSheet(1);
    $value = $sheet->getCell('A1')->getValue();