code: def test_convert_keys_to_string(self):
      test_data = {
          "spam": "eggs",
          "foo": frozenset(["Gah!"]),
          "bar": {"baz": 97},
          "list": [
              "list",
              (True, "Maybe"),
              set(["and", "a", "set", 1]),
          ],
      }
  
      converted_data = convert_keys_to_string(test_data)
  
      assert converted_data == {
          "bar": {"baz": 97},
          "foo": frozenset(["Gah!"]),
          "list": [
              "list",
              (True, "Maybe"),
              set(["and", "a", "set", 1]),
          ],
          "spam": "eggs",
      }
  
imports: import os
  import time
  import tempfile
  import platform
  import datetime
  from pytz import timezone
  from io import open
  from datmo.core.util.misc_functions import bytes2human, create_unique_hash, mutually_exclusive, is_project_dir, find_project_dir, grep, prettify_datetime, format_table, parse_cli_key_value, convert_keys_to_string, get_datmo_temp_path, parse_path, parse_paths, list_all_filepaths
  from datmo.core.util.exceptions import MutuallyExclusiveArguments, RequiredArgumentMissing, InvalidDestinationName, PathDoesNotExist, TooManyArgumentsFound
label_desc: Use image node_id 15 for calling the TestMiscFunctions obj's underlying member method code with example usage: obj.test_convert_keys_to_string() without return types