@Override
        public Progress process(Processing processing) {
            processing.getDocumentOperations().clear();
            return Progress.DONE;
        }
@author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
docproc/src/test/java/com/yahoo/docproc/jdisc/DocumentProcessingHandlerForkTestCase.java