private void testSequencingWhenChangingId() throws InterruptedException {
        String trace = processDocument(TOMULTIPLY, "id:ns:baz::transform", 1).toString();
        assertTrue(containsSequenceId(trace, 2033581295));
        assertTrue(containsSequenceId(trace, -633118987));
        assertEquals(2, countSequencerMessages(trace));
    }
@author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
docproc/src/test/java/com/yahoo/docproc/jdisc/DocumentProcessingHandlerForkTestCase.java