code: def local_dvc_dir(self) -> Optional[str]:
      from dvc.fs import GitFileSystem, LocalFileSystem
  
      if not self.dvc_dir:
          return None
  
      if isinstance(self.fs, LocalFileSystem):
          return self.dvc_dir
  
      if not isinstance(self.fs, GitFileSystem):
          return None
  
      relparts: Tuple[str, ...] = ()
      if self.root_dir != "/":
          # subrepo
          relparts = self.fs.relparts(self.root_dir, "/")
  
      dvc_dir = os.path.join(
          self.scm.root_dir,
          *relparts,
          self.DVC_DIR,
      )
      if os.path.exists(dvc_dir):
          return dvc_dir
  
      return None
  
imports: import os
  from collections import defaultdict
  from contextlib import contextmanager
  from functools import wraps
  from typing import TYPE_CHECKING, Callable, ContextManager, Iterable, Optional, Tuple, Union
  from dvc.exceptions import DvcException, NotDvcRepoError, OutputNotFoundError, RevCollectionError
  from dvc.ignore import DvcIgnoreFilter
  from dvc.log import logger
  from dvc.utils.objects import cached_property
label_desc: Use image node_id 5 for calling the Repo obj's underlying member method code with example usage: obj.local_dvc_dir() and returns: None, None, self, None, dvc_dir