class_docstr: Abstract base class for TensorBoard fetchers.
  
  Syncs TensorBoard files from remote file blob stores.
code: def __init__(
      self,
      storage_config: Dict[str, Any],
      storage_paths: List[str],
      local_dir: str,
  ):
      pass
  
file_path: determined/harness/determined/tensorboard/fetchers/base.py
imports: import abc
  import datetime
  from typing import Any, Callable, Dict, Generator, List
label_desc: Use image node_id 1 to create a new Fetcher object  with example: obj = Fetcher(storage_config, storage_paths, local_dir)