*/
@Test
public void testUnmarshalOldMatrixBuild() throws Exception {
XStream xStream = new XStream2();
xStream.registerConverter(new TriggerContextConverter());
xStream.alias("matrix-run", MatrixRun.class);
Object obj = xStream.fromXML(getClass().getResourceAsStream("matrix_build.xml"));
assertTrue(obj instanceof MatrixRun);
MatrixRun run = (MatrixRun)obj;
Cause.UpstreamCause upCause = run.getCause(Cause.UpstreamCause.class);