@Override
    public AndP<V> clone() {
        final AndP<V> clone = (AndP<V>) super.clone();
        clone.biPredicate = new AndBiPredicate(clone);
        return clone;
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/util/AndP.java