docs: public Document fromJsoup(org.jsoup.nodes.Document in) {
          Validate.notNull(in);
          DocumentBuilder builder;
          try {
          	//set the factory to be namespace-aware
          	factory.setNamespaceAware(true);
              builder = factory.newDocumentBuilder();
              Document out = builder.newDocument();
              convert(in, out);
              return out;
          } catch (ParserConfigurationException e) {
              throw new IllegalStateException(e);
          }
      }