@Override
        public Traversal<Vertex, Map<String, Object>> get_g_V_hasXageX_asXaX_out_in_hasXageX_asXbX_selectXa_bX_whereXa_neqXbXX() {
            return g.V().has("age").as("a").out().in().has("age").as("b").select("a", "b").where("a", neq("b"));
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/WhereTest.java