gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONSerializersV2.java [468:504]:
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        public Edge deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
            final DetachedEdge.Builder e = DetachedEdge.build();
            final DetachedVertex.Builder inV = DetachedVertex.build();
            final DetachedVertex.Builder outV = DetachedVertex.build();
            while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                if (jsonParser.getCurrentName().equals(GraphSONTokens.ID)) {
                    jsonParser.nextToken();
                    e.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.LABEL)) {
                    jsonParser.nextToken();
                    e.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.OUT)) {
                    jsonParser.nextToken();
                    outV.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.OUT_LABEL)) {
                    jsonParser.nextToken();
                    outV.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.IN)) {
                    jsonParser.nextToken();
                    inV.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.IN_LABEL)) {
                    jsonParser.nextToken();
                    inV.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.PROPERTIES)) {
                    jsonParser.nextToken();
                    while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                        jsonParser.nextToken();
                        e.addProperty(deserializationContext.readValue(jsonParser, Property.class));
                    }
                }
            }

            e.setInV(inV.create());
            e.setOutV(outV.create());

            return e.create();
        }
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gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONSerializersV3.java [491:527]:
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        public Edge deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
            final DetachedEdge.Builder e = DetachedEdge.build();
            final DetachedVertex.Builder inV = DetachedVertex.build();
            final DetachedVertex.Builder outV = DetachedVertex.build();
            while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                if (jsonParser.getCurrentName().equals(GraphSONTokens.ID)) {
                    jsonParser.nextToken();
                    e.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.LABEL)) {
                    jsonParser.nextToken();
                    e.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.OUT)) {
                    jsonParser.nextToken();
                    outV.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.OUT_LABEL)) {
                    jsonParser.nextToken();
                    outV.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.IN)) {
                    jsonParser.nextToken();
                    inV.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.IN_LABEL)) {
                    jsonParser.nextToken();
                    inV.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.PROPERTIES)) {
                    jsonParser.nextToken();
                    while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                        jsonParser.nextToken();
                        e.addProperty(deserializationContext.readValue(jsonParser, Property.class));
                    }
                }
            }

            e.setInV(inV.create());
            e.setOutV(outV.create());

            return e.create();
        }
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