code: public function getPrintArea($index = 0)
      {
          if ($index == 0) {
              return $this->printArea;
          }
          $printAreas = explode(',', $this->printArea);
          if (isset($printAreas[$index - 1])) {
              return $printAreas[$index - 1];
          }
  
          throw new PhpSpreadsheetException('Requested Print Area does not exist');
      }
docs: Get print area.
  
  @param int $index Identifier for a specific print area range if several ranges have been set
  Default behaviour, or a index value of 0, will return all ranges as a comma-separated string
  Otherwise, the specific range identified by the value of $index will be returned
  Print areas are numbered from 1
  
  @throws PhpSpreadsheetException
  
  @return string