code: def __init__(
      self,
      dataset_uuid: Optional[str] = None,
      file_format: Optional[str] = None,
  ):
      self._dataset_uuid = dataset_uuid
      self._file_format = file_format
  
file_path: ray/python/ray/data/datasource/filename_provider.py
imports: from typing import Any, Dict, Optional
  from ray.data.block import Block
  from ray.util.annotations import PublicAPI
label_desc: Use image node_id 1 to create a new _DefaultFilenameProvider object from inherited base classes: FilenameProvider with example: obj = _DefaultFilenameProvider(dataset_uuid, file_format)