@Override
        public Traversal<Vertex, String> get_g_V_whereXinXknowsX_outXcreatedX_count_is_0XX_name() {
            return g.V().where(in("knows").out("created").count().is(0)).values("name");
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/CountTest.java