code: def _decombine_key(
      k: str, delimiter: str = _DELIMITER
  ) -> Sequence[str]:
      return k.split(delimiter)
  
imports: from __future__ import annotations
  import collections
  import dataclasses
  import functools
  import os
  from typing import Any, Dict, Generator, Optional, Sequence, Text, Tuple, Union
  import numpy
  from tensorflow_datasets.core.utils.lazy_imports_utils import tensorflow
  import tensorflow_datasets.public_api
  from tensorflow_datasets.rl_unplugged import rlu_common
label_desc: Use image node_id 2 for calling a global function with example usage: _decombine_key(k, delimiter) and returns: k