code: public static Option fromJSON(String json) {
          Gson gson = new GsonBuilder().setPrettyPrinting().
                  registerTypeAdapter(Series.class, new SeriesDeserializer()).
                  registerTypeAdapter(Axis.class, new AxisDeserializer()).create();
          Option option = gson.fromJson(json, Option.class);
          return option;
      }
docs: 反序列化
  
  @param json
  @return