@Override
    public Iterator<Vertex> vertices(final Direction direction) {
        return shuffleIterator(super.vertices(direction));
    }
@author Cole Greer (https://github.com/Cole-Greer)
tinkergraph-gremlin/src/test/java/org/apache/tinkerpop/gremlin/tinkergraph/structure/TinkerShuffleEdge.java