code: def data_for_grouping(dtype):
      """
      Expected to be like [B, B, NA, NA, A, A, B, C]
  
      Where A < B < C and NA is missing
      """
      a = pd.Timestamp("2000-01-01")
      b = pd.Timestamp("2000-01-02")
      c = pd.Timestamp("2000-01-03")
      na = "NaT"
      return DatetimeArray._from_sequence(
          np.array([b, b, na, na, a, a, b, c], dtype="datetime64[ns]"),
          dtype=dtype,
      )
  
imports: import numpy
  import pytest
  from pandas.core.dtypes.dtypes import DatetimeTZDtype
  import pandas
  import pandas._testing
  from pandas.core.arrays import DatetimeArray
  from pandas.tests.extension import base
label_desc: Use image node_id 6 for calling a global function with example usage: data_for_grouping(dtype) and returns: DatetimeArray