code: def test_readonly_dict():
      d = dict(a=1, b=2, c=3)
      d = make_read_only(d)
      _check_read_only_dict(d)
  
imports: import json
  import pickle
  import pytest
  from copy import copy, deepcopy
  from sacred.config.custom_containers import make_read_only, ReadOnlyList, ReadOnlyDict
  from sacred.utils import SacredError
label_desc: Use image node_id 5 for calling a global function with example usage: test_readonly_dict() without return types