docstr: Check if the directory is a dvc repo.
code: def _is_dvc_repo(self, dir_path):
      """Check if the directory is a dvc repo."""
      if not self._traverse_subrepos:
          return False
  
      from dvc.repo import Repo
  
      repo_path = self.repo.fs.join(dir_path, Repo.DVC_DIR)
      return self.repo.fs.isdir(repo_path)
  
imports: import errno
  import functools
  import ntpath
  import os
  import posixpath
  import threading
  from collections import deque
  from contextlib import ExitStack, suppress
  from typing import TYPE_CHECKING, Any, Callable, Dict, Optional, Tuple, Type, Union
  from fsspec.spec import AbstractFileSystem
  from funcy import wrap_with
  from dvc.log import logger
  from dvc_objects.fs.base import FileSystem
  from .data import DataFileSystem
label_desc: Use image node_id 21 for calling the _DVCFileSystem obj's underlying member method code with example usage: obj._is_dvc_repo(dir_path) and returns: self, False