@Override
    public MemoryComputeKey<TraverserSet<S>> getMemoryComputeKey() {
        return MemoryComputeKey.of(this.getId(), new RangeGlobalStep.RangeBiOperator<>(this.limit.get()), false, true);
    }
@author Matt Frantz (http://github.com/mhfrantz)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/TailGlobalStep.java