@Override
    public ConnectiveStep<S> clone() {
        final ConnectiveStep<S> clone = (ConnectiveStep<S>) super.clone();
        clone.traversals = new ArrayList<>();
        for (final Traversal.Admin<S, ?> traversal : this.traversals) {
            clone.traversals.add(traversal.clone());
        }
        return clone;
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/ConnectiveStep.java