class_docstr: A key for a dataset used for analysis.
class_docstr_tok: ["A","key","for","a","dataset","used","for","analysis","."]
code: def is_flattened_dataset_key(self) -> bool:
      return self.key == self._FLATTENED_DATASET_KEY
  
imports: import os
  import pickle
  import re
  import sys
  from typing import Iterable, Mapping, List, Optional, Union, Tuple
  import apache_beam
  import tensorflow
  from tfx_bsl.types import tfx_namedtuple
label_desc: Use image node_id 4 for calling the DatasetKey obj's underlying member method code with example usage: obj.is_flattened_dataset_key() and returns: unknown