code: def test_encode_decode_bytes(self):
      b_string = b"abc"
      json_string = json_utils.Encoder().encode(b_string)
      loaded = json_utils.decode(json_string)
      self.assertAllEqual(b_string, loaded)
  
file_path: keras/keras/legacy/saving/json_utils_test.py
imports: import enum
  import pytest
  from keras import backend
  from keras import testing
  from keras.legacy.saving import json_utils
label_desc: Use image node_id 3 for calling the JsonUtilsTestAllBackends obj's underlying member method code with example usage: obj.test_encode_decode_bytes() without return types