private function writeOnWorkSheet(Map $groupedValues, ExcelOutputFile $spreadSheet, array $years, $index = 0)
 {
     if (!$groupedValues->isEmpty()) {
         parent::titles($years);
         parent::addValuesToARow($groupedValues, $years);
         $spreadSheet->setNewDataToExcel($this->dataToExcel);
         $nameGroup = $groupedValues->get(0)->offsetGet(0)->getSubgroupName();
         $spreadSheet->buildSpreadSheet($nameGroup, $index);
     }
 }