@Override
        public TraverserSet<S> apply(final TraverserSet<S> mutatingSeed, final TraverserSet<S> set) {
            if (this.highRange == -1 || mutatingSeed.size() < this.highRange)
                mutatingSeed.addAll(set);
            return mutatingSeed;
        }
@author Bob Briody (http://bobbriody.com)
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/RangeGlobalStep.java