code: public function setBottomRightPosition($cell, $xOffset = null, $yOffset = null)
      {
          $this->bottomRightCellRef = $cell;
          if ($xOffset !== null) {
              $this->setBottomRightXOffset($xOffset);
          }
          if ($yOffset !== null) {
              $this->setBottomRightYOffset($yOffset);
          }
  
          return $this;
      }
docs: Set the Bottom Right position of the chart.
  
  @param string $cell
  @param int $xOffset
  @param int $yOffset
  
  @return Chart