class_docstr: Store and load checkpoints from S3.
code: def get_storage_prefix(self, storage_id: str) -> str:
      return os.path.join(self.prefix, storage_id)
  
file_path: determined/harness/determined/common/storage/s3.py
imports: import logging
  import os
  import re
  import tempfile
  from typing import Dict, List, Optional, Union
  import requests
  from determined import errors
  from determined.common import storage, util
label_desc: Use image node_id 2 for calling the S3StorageManager obj's underlying member method code with example usage: obj.get_storage_prefix(storage_id) and returns: os