@Override
        public Traversal<Vertex, Map<String, Object>> get_g_V_matchXa_outXknowsX_name_bX_identity() {
            return g.V().match(__.as("a").out("knows").values("name").as("b")).identity();
        }
@author Joshua Shinavier (http://fortytwo.net)
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MatchTest.java