@Override
        public void serialize(final List list, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider)
                throws IOException {
            for(Object o : list) {
                jsonGenerator.writeObject(o);
            }
        }
Coerces {@code Map.Entry} to a {@code Map} with a single entry in it.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/JavaUtilSerializersV4.java