@Test
    @LoadGraphWith(MODERN)
    public void g_V_groupCount_byXbothE_countX() {
        final Traversal<Vertex, Map<Long, Long>> traversal = get_g_V_groupCount_byXbothE_countX();
        printTraversalForm(traversal);
        checkMap(new HashMap<Long, Long>() {{
            put(1l, 3l);
            put(3l, 3l);
        }}, traversal.next());
        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