@Override
    protected List<Pair<String, CallStack>> getCallStacks() {
        ArrayList<Pair<String, CallStack>> stacks = new ArrayList<>(6);
        stacks.add(new Pair<>(TOMANYALLINSAMEBUCKET, new CallStack().addLast(new OneToManyDocumentsAllInSameBucketProcessor())));
        stacks.add(new Pair<>(TOMANYSOMEINSAMEBUCKET, new CallStack().addLast(new OneToManyDocumentsSomeInSameBucketProcessor())));
        stacks.add(new Pair<>(TOMANY, new CallStack().addLast(new OneToManyDocumentsProcessor())));
        stacks.add(new Pair<>(TOONE, new CallStack().addLast(new OneToOneDocumentsProcessor())));
        stacks.add(new Pair<>(TOZERO, new CallStack().addLast(new OneToZeroDocumentsProcessor())));
        stacks.add(new Pair<>(TOMULTIPLY, new CallStack().addLast(new MultiplyProcessor())));
        return stacks;
    }
@author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
docproc/src/test/java/com/yahoo/docproc/jdisc/DocumentProcessingHandlerForkTestCase.java