@Test
public void testNullOutputFromTransformation() throws IOException {
final QName A = new QName("a");
final QName B = new QName("b");
BaseTransformerRegistry xformReg = new BaseTransformerRegistry();
TransformSequence transSequence = TransformSequence.from(A).to(B);
DefaultMessage message = new DefaultMessage().setContent("testNull");
Message2NullTransformer transformer = new Message2NullTransformer();
xformReg.addTransformer(transformer, A, B);
transSequence.apply(message, xformReg);
System.out.println(message.getContent());
Assert.assertNull(message.getContent());
}