code: def get_filename_for_row(
      self,
      row: Dict[str, Any],
      task_index: int,
      block_index: int,
      row_index: int,
  ) -> str:
      file_id = f"{task_index:06}_{block_index:06}_{row_index:06}"
      return self._generate_filename(file_id)
  
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 3 for calling the _DefaultFilenameProvider obj's underlying member method code with example usage: obj.get_filename_for_row(row, task_index, block_index, row_index) and returns: self