@Test
    @LoadGraphWith(MODERN)
    public void g_VX1X_outXcreatedX_valueMap() {
        final Traversal<Vertex, Map<Object, List<String>>> traversal = get_g_VX1X_outXcreatedX_valueMap(convertToVertexId("marko"));
        printTraversalForm(traversal);
        assertTrue(traversal.hasNext());
        final Map<Object, List<String>> values = traversal.next();
        assertFalse(traversal.hasNext());
        assertEquals("lop", values.get("name").get(0));
        assertEquals("java", values.get("lang").get(0));
        assertEquals(2, values.size());
    }
@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/ValueMapTest.java