@Override
        public Traversal<Vertex, Path> get_g_V_repeatXoutX_timesX2X_path_by_byXnameX_byXlangX() {
            return g.V().repeat(out()).times(2).path().by().by("name").by("lang");
        }
@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/map/PathTest.java