@Override
        public Traversal<Vertex, String> get_g_V_repeatXa_outXknows_repeatXb_outXcreatedX_filterXloops_isX0XX_emit_lang() {
            return g.V().repeat("a", out("knows").repeat("b", out("created").filter(loops("a").is(0))).emit()).emit().values("lang");
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/RepeatTest.java