@Override
        public Traversal<Vertex, Double> get_g_withSackX1_sumX_VX1X_localXoutXknowsX_barrierXnormSackXX_inXknowsX_barrier_sack(final Object v1Id) {
            return g.withSack(1.0d, sum).V(v1Id).local(out("knows").barrier(normSack)).in("knows").barrier().sack();
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/sideEffect/SackTest.java