class_docstr: Abstract class representing dataloader which wraps another dataloader.
  
  Attribute accesses are passed to the wrapped dataloader.
code: def __next__(self) -> Any:
      pass
  
file_path: ClassyVision/classy_vision/dataset/dataloader_wrapper.py
imports: from abc import ABC, abstractmethod
  from typing import Any, Iterable, Iterator
label_desc: Use image node_id 3 for calling the DataloaderWrapper obj's underlying member method code with example usage: obj.__next__() without return types