code: def _get_input_dir(inputs: Sequence[Any]) -> Optional[str]:
      indexed_paths = _get_indexed_paths(inputs[0])
  
      if len(indexed_paths) == 0:
          # Check whether the second element has any input_path
          indexed_paths = _get_indexed_paths(inputs[1])
          if len(indexed_paths) == 0:
              return None
  
          # Every element should have filepaths if any contains one.
          raise ValueError(
              f"The provided item {inputs[0]} didn't contain any filepaths."
          )
  
      absolute_path = str(
          Path(list(indexed_paths.values())[0]).resolve()
      )
  
      if indexed_paths[0] != absolute_path:
          raise ValueError("The provided path should be absolute.")
  
      return "/" + os.path.join(*str(absolute_path).split("/")[:4])
  
imports: import inspect
  import os
  from datetime import datetime
  from pathlib import Path
  from types import FunctionType
  from typing import Any, Callable, Dict, Optional, Sequence, Union
  import torch
  from lightning.data.streaming.constants import _LIGHTNING_CLOUD_LATEST, _TORCH_GREATER_EQUAL_2_1_0
  from lightning.data.streaming.data_processor import DataChunkRecipe, DataProcessor, DataTransformRecipe
label_desc: Use image node_id 2 for calling a global function with example usage: _get_input_dir(inputs) and returns: unknown, None