code: def _lower_keys(data):
      return {
          k.lower(): _lower_keys(v) if isinstance(v, dict) else v
          for k, v in data.items()
      }
  
imports: import os
  import re
  from contextlib import contextmanager
  from functools import partial
  from typing import TYPE_CHECKING, Dict, Optional
  from funcy import compact, memoize, re_find
  from dvc.exceptions import DvcException, NotDvcRepoError
  from dvc.log import logger
  from .utils.objects import cached_property
label_desc: Use image node_id 6 for calling a global function with example usage: _lower_keys(data) and returns: unknown