transformer.transform(in.getContent(), result);
transformer.transform(src, result);
    protected void transformContent(Transformer transformer, MessageExchange exchange, NormalizedMessage in, NormalizedMessage out) throws TransformerException, MessagingException {        if (isUseStringBuffer()) {            StringWriter buffer = new StringWriter();            Result result = new StreamResult(buffer);            transformer.transform(in.getContent(), result);            out.setContent(new StringSource(buffer.toString()));        }        else {            ByteArrayOutputStream buffer = new ByteArrayOutputStream();            Result result = new StreamResult(buffer);            transformer.transform(in.getContent(), result);            out.setContent(new BytesSource(buffer.toByteArray()));        }    }