@Override
        public Traversal<Vertex, Map<String, Vertex>> get_g_V_matchXa_knows_b__b_created_cX() {
            return g.V().match(
                    as("a").out("knows").as("b"),
                    as("b").out("created").as("c"));
        }
@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