@Override
    public Set<Class<? extends VerificationStrategy>> applyPrior() {
        return Collections.singleton(ComputerVerificationStrategy.class);
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/verification/StandardVerificationStrategy.java