@Test
    @LoadGraphWith(MODERN)
    public void g_V_unionXoutXknowsX__outXcreatedX_inXcreatedXX_groupCount_selectXvaluesX_unfold_sum() {
        final Traversal<Vertex, Long> traversal = get_g_V_unionXoutXknowsX__outXcreatedX_inXcreatedXX_groupCount_selectXvaluesX_unfold_sum();
        printTraversalForm(traversal);
        assertEquals(12l, traversal.next().longValue());
        assertFalse(traversal.hasNext());
        checkSideEffects(traversal.asAdmin().getSideEffects());
    }
@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/sideEffect/GroupCountTest.java