from static method
Creates a DOMNode from dynamic parameter entry.
entry Can be a DOMNode, a String with HTML, a Text,
a Function or an external element.
Implementation
static DIVElement? from(Object? entry) {
  if (entry == null) return null;
  if (_domHTML.isHtmlNode(entry)) {
    entry = _domHTML.toDOMNode(entry);
  }
  if (entry is DIVElement) return entry;
  if (entry is DOMElement) {
    _checkTag('div', entry);
    return DIVElement(
        attributes: entry._attributes,
        content: entry._content,
        commented: entry.isCommented);
  }
  return null;
}