code: function rowgroup(items, name) {
      return items.map(([htmlterm, ariaterm], i) => {
          htmlcount += htmlterm.split(', ').length
          ariacount += ariaterm.split(', ').length
          return tr([
              !i && th({
                  rowSpan : items.length,
                  children : name,
              }),
              td(htmlterm),
              td(ariaterm)
          ])
      })
  }
docs: Builds a row group from input parameters
  @param items
  @param name