@Override
        public Progress process(Processing processing) {
            List<DocumentOperation> operations = processing.getDocumentOperations();
            operations.clear();
            operations.add(new DocumentPut(type, "id:foo:baz::er:bra"));
            operations.add(new DocumentPut(type, "id:foo:baz::er:ja"));
            operations.add(new DocumentPut(type, "id:foo:baz::trallala"));
            operations.add(new DocumentPut(type, "id:foo:baz::hahahhaa"));
            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