code: def fs(self, fs: "FileSystem"):
      self._fs = fs
      # Our graph cache is no longer valid, as it was based on the previous
      # fs.
      self._reset()
  
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 16 for calling the Repo obj's underlying member method code with example usage: obj.fs(fs) without return types