code: public function setReadOrder($pValue)
      {
          if ($pValue < 0 || $pValue > 2) {
              $pValue = 0;
          }
          if ($this->isSupervisor) {
              $styleArray = $this->getStyleArray(['readOrder' => $pValue]);
              $this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
          } else {
              $this->readOrder = $pValue;
          }
  
          return $this;
      }
docs: Set read order.
  
  @param int $pValue
  
  @return Alignment