gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV3.java [62:149]:
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                             final String valuePropertyName) {
        super(idRes, propertyName, typeInfo, valuePropertyName);
    }

    @Override
    public WritableTypeId writeTypePrefix(final JsonGenerator jsonGenerator, final WritableTypeId writableTypeId) throws IOException {
        if (writableTypeId.valueShape == JsonToken.START_OBJECT) {
            if (writableTypeId.forValue instanceof Map) {
                writeTypePrefix(jsonGenerator, getTypeIdResolver().idFromValueAndType(writableTypeId.forValue, getClassFromObject(writableTypeId.forValue)));
                jsonGenerator.writeStartArray();
            } else {
                jsonGenerator.writeStartObject();
            }
        } else if (writableTypeId.valueShape == JsonToken.START_ARRAY) {
            if (writableTypeId.forValue instanceof List || writableTypeId.forValue instanceof Set) {
                writeTypePrefix(jsonGenerator, getTypeIdResolver().idFromValueAndType(writableTypeId.forValue, getClassFromObject(writableTypeId.forValue)));
                jsonGenerator.writeStartArray();
            } else {
                jsonGenerator.writeStartArray();
            }
        } else if (canWriteTypeId()) {
            writeTypePrefix(jsonGenerator, getTypeIdResolver().idFromValueAndType(writableTypeId.forValue, getClassFromObject(writableTypeId.forValue)));
        } else {
            throw new IllegalStateException("Could not write prefix: shape[" + writableTypeId.valueShape + "] value[" + writableTypeId.forValue + "]");
        }

        return writableTypeId;
    }

    @Override
    public WritableTypeId writeTypeSuffix(final JsonGenerator jsonGenerator, final WritableTypeId writableTypeId) throws IOException {
        if (writableTypeId.valueShape == JsonToken.START_OBJECT) {
            if (writableTypeId.forValue instanceof Map) {
                jsonGenerator.writeEndArray();
                writeTypeSuffix(jsonGenerator);
            } else {
                jsonGenerator.writeEndObject();
            }
        } else if (writableTypeId.valueShape == JsonToken.START_ARRAY) {
            if (writableTypeId.forValue instanceof List || writableTypeId.forValue instanceof Set) {
                jsonGenerator.writeEndArray();
                writeTypeSuffix(jsonGenerator);
            } else {
                jsonGenerator.writeEndArray();
            }
        } else if (canWriteTypeId()) {
            writeTypeSuffix(jsonGenerator);
        } else {
            throw new IllegalStateException("Could not write suffix: shape[" + writableTypeId.valueShape + "] value[" + writableTypeId.forValue + "]");
        }

        return writableTypeId;
    }

    @Override
    protected Class getClassFromObject(final Object o) {
        final Class c = o.getClass();
        if (classMap.containsKey(c))
            return classMap.get(c);

        final Class mapped;
        if (Map.class.isAssignableFrom(c)) {
            if (Tree.class.isAssignableFrom(c))
                mapped = Tree.class;
            else
                mapped = Map.class;
        } else if (List.class.isAssignableFrom(c))
            mapped = List.class;
        else if (Set.class.isAssignableFrom(c) && !BulkSet.class.isAssignableFrom(c))   // we have special handling of BulkSet
            mapped = Set.class;
        else if (Vertex.class.isAssignableFrom(c))
            mapped = Vertex.class;
        else if (Edge.class.isAssignableFrom(c))
            mapped = Edge.class;
        else if (Path.class.isAssignableFrom(c))
            mapped = Path.class;
        else if (VertexProperty.class.isAssignableFrom(c))
            mapped = VertexProperty.class;
        else if (Metrics.class.isAssignableFrom(c))
            mapped = Metrics.class;
        else if (TraversalMetrics.class.isAssignableFrom(c))
            mapped = TraversalMetrics.class;
        else if (Property.class.isAssignableFrom(c))
            mapped = Property.class;
        else if (ByteBuffer.class.isAssignableFrom(c))
            mapped = ByteBuffer.class;
        else if (InetAddress.class.isAssignableFrom(c))
            mapped = InetAddress.class;
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gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV4.java [62:149]:
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                             final String valuePropertyName) {
        super(idRes, propertyName, typeInfo, valuePropertyName);
    }

    @Override
    public WritableTypeId writeTypePrefix(final JsonGenerator jsonGenerator, final WritableTypeId writableTypeId) throws IOException {
        if (writableTypeId.valueShape == JsonToken.START_OBJECT) {
            if (writableTypeId.forValue instanceof Map) {
                writeTypePrefix(jsonGenerator, getTypeIdResolver().idFromValueAndType(writableTypeId.forValue, getClassFromObject(writableTypeId.forValue)));
                jsonGenerator.writeStartArray();
            } else {
                jsonGenerator.writeStartObject();
            }
        } else if (writableTypeId.valueShape == JsonToken.START_ARRAY) {
            if (writableTypeId.forValue instanceof List || writableTypeId.forValue instanceof Set) {
                writeTypePrefix(jsonGenerator, getTypeIdResolver().idFromValueAndType(writableTypeId.forValue, getClassFromObject(writableTypeId.forValue)));
                jsonGenerator.writeStartArray();
            } else {
                jsonGenerator.writeStartArray();
            }
        } else if (canWriteTypeId()) {
            writeTypePrefix(jsonGenerator, getTypeIdResolver().idFromValueAndType(writableTypeId.forValue, getClassFromObject(writableTypeId.forValue)));
        } else {
            throw new IllegalStateException("Could not write prefix: shape[" + writableTypeId.valueShape + "] value[" + writableTypeId.forValue + "]");
        }

        return writableTypeId;
    }

    @Override
    public WritableTypeId writeTypeSuffix(final JsonGenerator jsonGenerator, final WritableTypeId writableTypeId) throws IOException {
        if (writableTypeId.valueShape == JsonToken.START_OBJECT) {
            if (writableTypeId.forValue instanceof Map) {
                jsonGenerator.writeEndArray();
                writeTypeSuffix(jsonGenerator);
            } else {
                jsonGenerator.writeEndObject();
            }
        } else if (writableTypeId.valueShape == JsonToken.START_ARRAY) {
            if (writableTypeId.forValue instanceof List || writableTypeId.forValue instanceof Set) {
                jsonGenerator.writeEndArray();
                writeTypeSuffix(jsonGenerator);
            } else {
                jsonGenerator.writeEndArray();
            }
        } else if (canWriteTypeId()) {
            writeTypeSuffix(jsonGenerator);
        } else {
            throw new IllegalStateException("Could not write suffix: shape[" + writableTypeId.valueShape + "] value[" + writableTypeId.forValue + "]");
        }

        return writableTypeId;
    }

    @Override
    protected Class getClassFromObject(final Object o) {
        final Class c = o.getClass();
        if (classMap.containsKey(c))
            return classMap.get(c);

        final Class mapped;
        if (Map.class.isAssignableFrom(c)) {
            if (Tree.class.isAssignableFrom(c))
                mapped = Tree.class;
            else
                mapped = Map.class;
        } else if (List.class.isAssignableFrom(c))
            mapped = List.class;
        else if (Set.class.isAssignableFrom(c) && !BulkSet.class.isAssignableFrom(c))   // we have special handling of BulkSet
            mapped = Set.class;
        else if (Vertex.class.isAssignableFrom(c))
            mapped = Vertex.class;
        else if (Edge.class.isAssignableFrom(c))
            mapped = Edge.class;
        else if (Path.class.isAssignableFrom(c))
            mapped = Path.class;
        else if (VertexProperty.class.isAssignableFrom(c))
            mapped = VertexProperty.class;
        else if (Metrics.class.isAssignableFrom(c))
            mapped = Metrics.class;
        else if (TraversalMetrics.class.isAssignableFrom(c))
            mapped = TraversalMetrics.class;
        else if (Property.class.isAssignableFrom(c))
            mapped = Property.class;
        else if (ByteBuffer.class.isAssignableFrom(c))
            mapped = ByteBuffer.class;
        else if (InetAddress.class.isAssignableFrom(c))
            mapped = InetAddress.class;
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