@Test
    @LoadGraphWith(MODERN)
    public void g_withBulkXfalseX_withSackX1_sumX_V_out_barrier_sack() {
        final Traversal<Vertex, Integer> traversal = get_g_withBulkXfalseX_withSackX1_sumX_V_out_barrier_sack();
        printTraversalForm(traversal);
        checkResults(Arrays.asList(1, 1, 1, 3), traversal); // josh, vadas, ripple, lop
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/sideEffect/SackTest.java