code: def _prepend_cfg_filepaths(cfg: dict, prepend_dir: Path):
      """
      Recursively traverse through a nested dictionary and prepend a directory to any filepaths.
  
      Parameters
      ----------
      cfg
          The dictionary.
      prepend_dir
          The filepath to prepend to any filepaths in the dictionary.
  
      Returns
      -------
      The updated config dictionary.
      """
      for k, v in cfg.items():
          if isinstance(v, str):
              v = prepend_dir.joinpath(Path(v))
              if (
                  v.is_file() or v.is_dir()
              ):  # Update if prepending config_dir made config value a real filepath
                  cfg[k] = str(v)
          elif isinstance(v, dict):
              _prepend_cfg_filepaths(v, prepend_dir)
  
imports: import logging
  import os
  from functools import partial
  from importlib import import_module
  from pathlib import Path
  from typing import Any, Callable, Optional, Union, Type, TYPE_CHECKING
  import dill
  import numpy
  import toml
  from transformers import AutoTokenizer
  from alibi_detect.saving.registry import registry
  from alibi_detect.saving._tensorflow import load_detector_legacy, load_embedding_tf, load_kernel_config_tf, load_model_tf, load_optimizer_tf, prep_model_and_emb_tf, get_tf_dtype
  from alibi_detect.saving._pytorch import load_embedding_pt, load_kernel_config_pt, load_model_pt, load_optimizer_pt, prep_model_and_emb_pt, get_pt_dtype
  from alibi_detect.saving._keops import load_kernel_config_ke
  from alibi_detect.saving._sklearn import load_model_sk
  from alibi_detect.saving.validate import validate_config
  from alibi_detect.base import Detector, ConfigurableDetector, StatefulDetectorOnline
  from alibi_detect.utils.frameworks import has_tensorflow, has_pytorch, Framework
  from alibi_detect.saving.schemas import supported_models_tf, supported_models_torch
  from alibi_detect.utils.missing_optional_dependency import import_optional
label_desc: Use image node_id 16 for calling a global function with example usage: _prepend_cfg_filepaths(cfg, prepend_dir) without return types