code: def test_split_using_cut_off(col, cut_off, expected, df_mixed_types):
      """Test the cut off for different data types."""
      test = DropHighPSIFeatures(split_col=col, cut_off=cut_off)
      a, b = test._split_dataframe(df_mixed_types)
  
      pd.testing.assert_frame_equal(a, df_mixed_types.loc[expected])
      pd.testing.assert_frame_equal(
          b, df_mixed_types.loc[~df_mixed_types.index.isin(expected)]
      )
  
imports: from datetime import date
  import math
  import numpy
  import pandas
  import pytest
  from sklearn.datasets import make_classification
  from feature_engine.selection import DropHighPSIFeatures
label_desc: Use image node_id 18 for calling a global function with example usage: test_split_using_cut_off(col, cut_off, expected, df_mixed_types) without return types