code: def site_cache_dir(self) -> str:
      import getpass
      import hashlib
  
      from dvc.dirs import site_cache_dir
      from dvc.fs import GitFileSystem
      from dvc.version import version_tuple
  
      cache_dir = (
          self.config["core"].get("site_cache_dir") or site_cache_dir()
      )
  
      if isinstance(self.fs, GitFileSystem):
          relparts: Tuple[str, ...] = ()
          if self.root_dir != "/":
              # subrepo
              relparts = self.fs.relparts(self.root_dir, "/")
          root_dir = os.path.join(self.scm.root_dir, *relparts)
      else:
          root_dir = self.root_dir
  
      repos_dir = os.path.join(cache_dir, "repo")
  
      umask = os.umask(0)
      try:
          os.makedirs(repos_dir, mode=0o777, exist_ok=True)
      finally:
          os.umask(umask)
  
      # NOTE: Some number to change the generated token if none of the
      # components were changed (useful to prevent newer dvc versions from
      # using older broken cache). Please reset this back to 0 if other parts
      # of the token components are changed.
      salt = 2
  
      # NOTE: This helps us avoid accidentally reusing cache for repositories
      # that just happened to be at the same path as old deleted ones.
      btime = self._btime or getattr(
          os.stat(root_dir), "st_birthtime", None
      )
  
      md5 = hashlib.md5(  # noqa: S324
          str(
              (
                  root_dir,
                  btime,
                  getpass.getuser(),
                  version_tuple[0],
                  salt,
              )
          ).encode()
      )
      repo_token = md5.hexdigest()
      return os.path.join(repos_dir, repo_token)
  
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 34 for calling the Repo obj's underlying member method code with example usage: obj.site_cache_dir() and returns: os