code: def data_for_grouping():
      """
      Data for factorization, grouping, and unique tests.
  
      Expected to be like [B, B, NA, NA, A, A, B, C]
  
      Where A < B < C and NA is missing.
  
      If a dtype has _is_boolean = True, i.e. only 2 unique non-NA entries,
      then set C=B.
      """
      raise NotImplementedError
  
imports: import operator
  import pytest
  from pandas._config.config import _get_option
  from pandas import Series, options
label_desc: Use image node_id 11 for calling a global function with example usage: data_for_grouping() without return types