class_docstr: BuilderConfig for MovieLens dataset.
code: def parsing_fn(
      self,
  ) -> Optional[Callable[[str], Iterator[Tuple[int, Dict[str, Any]]],]]:
      return self._parsing_fn
  
imports: from __future__ import annotations
  import os
  import textwrap
  from typing import Any, Callable, Dict, Iterator, List, Optional, Tuple
  from absl import logging
  import numpy
  import tensorflow_datasets.public_api
  from tensorflow_datasets.structured import movielens_parsing
label_desc: Use image node_id 5 for calling the MovieLensConfig obj's underlying member method code with example usage: obj.parsing_fn() and returns: self