@Override
    public AggregateLocalStep<S> clone() {
        final AggregateLocalStep<S> clone = (AggregateLocalStep<S>) super.clone();
        if (null != this.storeTraversal)
            clone.storeTraversal = this.storeTraversal.clone();
        return clone;
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/sideEffect/AggregateLocalStep.java