  protected function get_InnerHtml() {
    $innerHtml = '';
    $indexedRowAttributes = $this->IndexedRowAttributes;
    foreach ($this->RowsInnerHtml as $rowIndex => $rowInnerHtml) {
      if (isset($indexedRowAttributes[$rowIndex])) {
        $innerHtml .= '    ' . $indexedRowAttributes[$rowIndex]->renderTag('tr', $rowInnerHtml) . "\n";
      }
    }
    return $innerHtml;
  }