code: def json(self):
      str_data = self.response.data.decode("utf-8")
      return json.loads(str_data) if str_data else {}
  
imports: import json
  import threading
  import urllib
  from unittest.mock import MagicMock
  import requests
label_desc: Use image node_id 12 for calling the ResponseMock obj's underlying member method code with example usage: obj.json() and returns: unknown