@Test
    @LoadGraphWith(MODERN)
    public void g_V_age_foldX0_plusX() {
        final Traversal<Vertex, Integer> traversal = get_g_V_age_foldX0_plusX();
        printTraversalForm(traversal);
        final Integer ageSum = traversal.next();
        assertFalse(traversal.hasNext());
        assertEquals(Integer.valueOf(123), ageSum);
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/FoldTest.java