code: private function mapVAlign($vAlign)
      {
          switch ($vAlign) {
              case Alignment::VERTICAL_BOTTOM:
                  return 'bottom';
              case Alignment::VERTICAL_TOP:
                  return 'top';
              case Alignment::VERTICAL_CENTER:
              case Alignment::VERTICAL_JUSTIFY:
                  return 'middle';
              default:
                  return 'baseline';
          }
      }
docs: Map VAlign.
  
  @param string $vAlign Vertical alignment
  
  @return string