code: protected function html2ooNodes($html, $lineNumbered)
      {
          if (!is_string($html)) {
              echo print_r($html, true);
              echo print_r(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS), true);
              die();
          }
  
          $body = $this->html2DOM($html);
  
          $retNodes = [];
          for ($i = 0; $i < $body->childNodes->length; $i++) {
              $child = $body->childNodes->item($i);
  
              /** @var \DOMNode $child */
              if ($child->nodeName == 'ul') {
                  // Alle anderen Nodes dieses Aufrufs werden ignoriert
                  if ($this->DEBUG) {
                      echo 'LIST<br>';
                  }
                  $recNewNodes = $this->html2ooNodeInt($child, $lineNumbered, false);
              } else {
                  if ($child->nodeType == XML_TEXT_NODE) {
                      $new_node = $this->getNextNodeTemplate($lineNumbered);
                      /** @var \DOMText $child */
                      if ($this->DEBUG) {
                          echo $child->nodeName . ' - ' . htmlentities($child->data, ENT_COMPAT, 'UTF-8') . '<br>';
                      }
                      $text       = new \DOMText();
                      $text->data = $child->data;
                      $new_node->appendChild($text);
                      $recNewNodes = [$new_node];
                  } else {
                      if ($this->DEBUG) {
                          echo $child->nodeName . '!!!!!!!!!!!!<br>';
                      }
                      $recNewNodes = $this->html2ooNodeInt($child, $lineNumbered, false);
                  }
              }
              foreach ($recNewNodes as $recNewNode) {
                  $retNodes[] = $recNewNode;
              }
          }
  
          return $retNodes;
      }
docs: @param string $html
  @param bool $lineNumbered
  
  @return \DOMNode[]
  @throws \Exception