@Override
    public ComputerResultStep<S> clone() {
        final ComputerResultStep<S> clone = (ComputerResultStep<S>) super.clone();
        clone.currentIterator = EmptyIterator.instance();
        return clone;
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/computer/traversal/step/map/ComputerResultStep.java