code: def test_objkeys(client):
      obj = {"foo": "bar", "baz": "qaz"}
      client.json().set("obj", Path.root_path(), obj)
      keys = client.json().objkeys("obj", Path.root_path())
      keys.sort()
      exp = list(obj.keys())
      exp.sort()
      assert exp == keys
  
      client.json().set("obj", Path.root_path(), obj)
      keys = client.json().objkeys("obj")
      assert keys == list(obj.keys())
  
      assert client.json().objkeys("fakekey") is None
  
imports: import pytest
  import redis
  from redis import Redis, exceptions
  from redis.commands.json.decoders import decode_list, unstring
  from redis.commands.json.path import Path
  from .conftest import _get_client, assert_resp_response, skip_ifmodversion_lt
label_desc: Use image node_id 25 for calling a global function with example usage: test_objkeys(client) without return types