@Test
    @LoadGraphWith(MODERN)
    public void g_injectX1_null_nullX_path_dedup() {
        final Traversal<Integer, Path> traversal = get_g_injectX1_null_nullX_path_dedup();
        printTraversalForm(traversal);
        checkResults(Arrays.asList(
                MutablePath.make().extend(1, Collections.emptySet()),
                MutablePath.make().extend(null, Collections.emptySet())), traversal);
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/PathTest.java