EchoString jaxb = (EchoString)u.unmarshal(inputStream);
JAXBSource src = new JAXBSource(context.createMarshaller(), jaxb);
// Create a Block using the sample string as the content. This simulates
// what occurs on the outbound JAX-WS dispatch<Source> client
Block block = f.createFrom(src, null, null);
// We didn't pass in a qname, so the following should return false
assertTrue(!block.isQNameAvailable());
// Assuming no handlers are installed, the next thing that will happen