code: def test_json_deserializable(self):
      payload = '{"box_mode": 2}'
      obj = json.loads(payload)
      try:
          obj["box_mode"] = BoxMode(obj["box_mode"])
      except Exception:
          self.fail("JSON deserialization failed")
  
imports: import json
  import math
  import numpy
  import unittest
  import torch
  from detectron2.structures import Boxes, BoxMode, pairwise_ioa, pairwise_iou
  from detectron2.utils.testing import reload_script_model
label_desc: Use image node_id 16 for calling the TestBoxMode obj's underlying member method code with example usage: obj.test_json_deserializable() without return types