JoliTypo\StateBag::fixSiblingNode PHP Method

    public function fixSiblingNode($key, $new_content)
    {
        $storedSibling = $this->getSiblingNode($key);
        if ($storedSibling) {
            $storedSibling->getParent()->replaceChild($storedSibling->getDocument()->createTextNode($new_content), $storedSibling->getNode());
            unset($this->siblingNode[$key][$this->currentDepth]);
        }
    }

 protected function fixViaState($content, StateBag $state_bag, $state_name, $open_regexp, $close_regexp, $open_replacement, $close_replacement)
 {
     $stored_sibling = $state_bag->getSiblingNode($state_name);
     // If no stored open quote node & open quote detected
     if ($stored_sibling === false && preg_match($open_regexp, $content)) {
         // Store the current node
         $state_bag->storeSiblingNode($state_name);
         // If we have a open sibling and we detect a closing quote
     } elseif ($stored_sibling instanceof StateNode && preg_match($close_regexp, $content)) {
         // Replace the closing tag
         $content = preg_replace($close_regexp, "\$1" . $close_replacement . '$2', $content, 1);
         // Replace the opening tag
         $open_content = preg_replace($open_regexp, "\$1" . $open_replacement . '$2', $stored_sibling->getNode()->wholeText, 1);
         $state_bag->fixSiblingNode($state_name, $open_content);
     }
     return $content;
 }