@Override
 public GraphTraversalSource traversal(final Graph graph, final TraversalStrategy... strategies) {
   final GraphTraversalSource.Builder builder = createBuilder(graph);
   Arrays.asList(strategies).forEach(builder::with);
   return builder.create(graph);
 }
 @Override
 public GraphTraversalSource traversal(final Graph graph) {
   final GraphTraversalSource.Builder builder = createBuilder(graph);
   return builder.create(graph);
 }