code: def test_groupby_rolling_non_monotonic(self):
      # GH 43909
  
      shuffled = [3, 0, 1, 2]
      sec = 1_000
      df = DataFrame(
          [
              {"t": Timestamp(2 * x * sec), "x": x + 1, "c": 42}
              for x in shuffled
          ]
      )
      with pytest.raises(ValueError, match=r".* must be monotonic"):
          df.groupby("c").rolling(on="t", window="3s")
  
imports: import numpy
  import pytest
  from pandas import DataFrame, DatetimeIndex, Index, MultiIndex, Series, Timestamp, date_range, to_datetime
  import pandas._testing
  from pandas.api.indexers import BaseIndexer
  from pandas.core.groupby.groupby import get_groupby
label_desc: Use image node_id 39 for calling the TestRolling obj's underlying member method code with example usage: obj.test_groupby_rolling_non_monotonic() without return types