Document out;
            if (in.childNodeSize() > 1 && in.childNode(0) instanceof org.jsoup.nodes.DocumentType) {
                final org.jsoup.nodes.DocumentType docType = (org.jsoup.nodes.DocumentType) in.childNode(0);

                final DOMImplementation impl = builder.getDOMImplementation();

                out = impl.createDocument(
                    null,
                    null,
                    impl.createDocumentType(
                        docType.attr("name"),
                        docType.attr("publicId"),
                        docType.attr("systemId")
                    ));

            } else {
                out = builder.newDocument();
            }