private static List<String> getTraversalSteps(final Traversal.Admin<?, ?> t) {
        return t.getSteps().stream().map(Object::toString).collect(Collectors.toList());
    }
Creates a Map containing "original", "intermediate" and "final" keys.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/types/TraversalExplanationSerializer.java