code: def test_nested_dict() -> None:
      obj1 = {"foo": {"bar": True}}
      obj2 = deepcopy_minimal(obj1)
      assert_different_identities(obj1, obj2)
      assert_different_identities(obj1["foo"], obj2["foo"])
  
file_path: openai-python/tests/test_deepcopy.py
imports: from openai._utils import deepcopy_minimal
label_desc: Use image node_id 3 for calling a global function with example usage: test_nested_dict() without return types