@Override
    public Object visitShortestPathConstants_maxDistance(final GremlinParser.ShortestPathConstants_maxDistanceContext ctx) {
        return ShortestPath.maxDistance;
    }
Covers {@code String} oriented constants used as arguments to {@link GraphTraversal#with(String)} steps.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/WithOptionsVisitor.java