class_docstr: Filesystem implementation for accessing workflow storage.
  
  We do not repeat the same comments for abstract methods in the base class.
class_docstr_tok: ["Filesystem","implementation","for","accessing","workflow","storage",".","We","do","not","repeat","the","same","comments","for","abstract","methods","in","the","base","class","."]
code: def make_key(self, *names: str) -> str:
      return os.path.join(str(self._workflow_root_dir), *names)
  
file_path: ray/python/ray/workflow/storage/filesystem.py
imports: import os
  import contextlib
  import json
  import shutil
  import pathlib
  from typing import Any, List
  import uuid
  from ray.workflow.storage.base import Storage, KeyNotFoundError
  import ray.cloudpickle
label_desc: Use image node_id 2 for calling the FilesystemStorageImpl obj's underlying member method code with example usage: obj.make_key() and returns: os