gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONSerializersV2.java [296:319]:
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        public void serialize(final TraversalExplanation traversalExplanation, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            final Map<String, Object> m = new HashMap<>();
            m.put(GraphSONTokens.ORIGINAL, getStepsAsList(traversalExplanation.getOriginalTraversal()));

            final List<Pair<TraversalStrategy, Traversal.Admin<?, ?>>> strategyTraversals = traversalExplanation.getStrategyTraversals();

            final List<Map<String, Object>> intermediates = new ArrayList<>();
            for (final Pair<TraversalStrategy, Traversal.Admin<?, ?>> pair : strategyTraversals) {
                final Map<String, Object> intermediate = new HashMap<>();
                intermediate.put(GraphSONTokens.STRATEGY, pair.getValue0().toString());
                intermediate.put(GraphSONTokens.CATEGORY, pair.getValue0().getTraversalCategory().getSimpleName());
                intermediate.put(GraphSONTokens.TRAVERSAL, getStepsAsList(pair.getValue1()));
                intermediates.add(intermediate);
            }
            m.put(GraphSONTokens.INTERMEDIATE, intermediates);

            if (strategyTraversals.isEmpty())
                m.put(GraphSONTokens.FINAL, getStepsAsList(traversalExplanation.getOriginalTraversal()));
            else
                m.put(GraphSONTokens.FINAL, getStepsAsList(strategyTraversals.get(strategyTraversals.size() - 1).getValue1()));

            jsonGenerator.writeObject(m);
        }
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gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONSerializersV3.java [319:342]:
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        public void serialize(final TraversalExplanation traversalExplanation, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            final Map<String, Object> m = new HashMap<>();
            m.put(GraphSONTokens.ORIGINAL, getStepsAsList(traversalExplanation.getOriginalTraversal()));

            final List<Pair<TraversalStrategy, Traversal.Admin<?, ?>>> strategyTraversals = traversalExplanation.getStrategyTraversals();

            final List<Map<String, Object>> intermediates = new ArrayList<>();
            for (final Pair<TraversalStrategy, Traversal.Admin<?, ?>> pair : strategyTraversals) {
                final Map<String, Object> intermediate = new HashMap<>();
                intermediate.put(GraphSONTokens.STRATEGY, pair.getValue0().toString());
                intermediate.put(GraphSONTokens.CATEGORY, pair.getValue0().getTraversalCategory().getSimpleName());
                intermediate.put(GraphSONTokens.TRAVERSAL, getStepsAsList(pair.getValue1()));
                intermediates.add(intermediate);
            }
            m.put(GraphSONTokens.INTERMEDIATE, intermediates);

            if (strategyTraversals.isEmpty())
                m.put(GraphSONTokens.FINAL, getStepsAsList(traversalExplanation.getOriginalTraversal()));
            else
                m.put(GraphSONTokens.FINAL, getStepsAsList(strategyTraversals.get(strategyTraversals.size() - 1).getValue1()));

            jsonGenerator.writeObject(m);
        }
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