@Override
    protected S map(final Traverser.Admin<S> traverser) {
        final S start = traverser.get();
        return applyRange(start, this.low.get(), this.high.get());
    }
@author Daniel Kuppitz (http://gremlin.guru)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/RangeLocalStep.java