code: def test_sort_timestamps_monotonically_decreasing(
      timeseries_dataframe,
  ):
      """Test sort_timestamps_monotonically for descending order"""
      df2 = timeseries_dataframe.sort_index(ascending=False)
      df3 = df2.sort_timestamps_monotonically("decreasing")
      assert df3.equals(df2)
  
file_path: pyjanitor/tests/timeseries/test_sort_timestamps_monotonically.py
imports: from random import randint
  import pandas
  import pytest
  import janitor
  import janitor.timeseries
label_desc: Use image node_id 3 for calling a global function with example usage: test_sort_timestamps_monotonically_decreasing(timeseries_dataframe) without return types