@Override
        public void serialize(final Vertex vertex, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider)
                throws IOException {
            jsonGenerator.writeStartObject();

            jsonGenerator.writeObjectField(GraphSONTokens.ID, vertex.id());
            jsonGenerator.writeStringField(GraphSONTokens.LABEL, vertex.label());
            writeTypeForGraphObjectIfUntyped(jsonGenerator, typeInfo, GraphSONTokens.VERTEX);
            writeProperties(vertex, jsonGenerator, serializerProvider);

            jsonGenerator.writeEndObject();

        }
GraphSON serializers for graph-based objects such as vertices, edges, properties, and paths. These serializers
present a generalized way to serialize the implementations of core interfaces.

@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONSerializersV3.java