docstr: Unflattening an already unflattened dict should be a noop.
docstr_tok: ["Unflattening","an","already","unflattened","dict","should","be","a","noop","."]
code: def test_unflatten_noop(self):
      """Unflattening an already unflattened dict should be a noop."""
      unflattened = {
          "a": 1,
          "b": {"c": {"d": [1, 2]}, "e": 3},
          "f": {"g": 3},
      }
      assert unflattened == unflatten_dict(unflattened)
      assert unflattened == unflatten_list_dict(unflattened)
  
imports: import copy
  from collections import OrderedDict
  import pytest
  import sys
  import unittest
  from unittest.mock import patch
  from ray.tune.utils.util import wait_for_gpu
  from ray.tune.utils.util import flatten_dict, unflatten_dict, unflatten_list_dict
label_desc: Use image node_id 7 for calling the UnflattenDictTest obj's underlying member method code with example usage: obj.test_unflatten_noop() without return types