code: def _collate_fn(x: T) -> T:
      """
      Dummy collate function to be used with _VideoTimestampsDataset
      """
      return x
  
imports: import bisect
  import math
  import warnings
  from fractions import Fraction
  from typing import Any, Callable, cast, Dict, List, Optional, Tuple, TypeVar, Union
  import torch
  from torchvision.io import _probe_video_from_file, _read_video_from_file, read_video, read_video_timestamps
  from .utils import tqdm
label_desc: Use image node_id 3 for calling a global function with example usage: _collate_fn(x) and returns: x