Is it possible to create an excel with multiple sheets in it?

Lookup addSheet() for phpspreadsheet

Apparently it does not possible with this module, since in the `encode` method below, the active sheet index is hard coded to 0.

      // Instantiate a new excel object.
      $xls = new Spreadsheet();
      $xls->setActiveSheetIndex(0);
      $sheet = $xls->getActiveSheet();

      // Set headers.
      $this->setHeaders($sheet, $data, $context);

      // Set the data.
      $this->setData($sheet, $data);

@genellann could you explain a bit more in detail why you would need to create an Excel file with multiple sheets in it?