@Test
    @FeatureRequirement(featureClass = GraphFeatures.class, feature = GraphFeatures.FEATURE_ORDERABILITY_SEMANTICS)
    public void g_inject_order() {
        final Traversal traversal = get_g_inject_order();
        printTraversalForm(traversal);
        checkOrderedResults(Arrays.asList(
                null,
                false, true,
                1, 2.0,
                "bar", "foo",
                Constants.uuid,
                Constants.set1, Constants.set2,
                Constants.list1, Constants.list2,
                Constants.map1, Constants.map2,
                Constants.date
        ), traversal);
    }
Mixed type values including list, set, map, uuid, date, boolean, numeric, string, null.
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/OrderabilityTest.java