code: def test_split_points_chronological(valid_cv):
      splits = valid_cv._best_splits
      assert list(splits) == sorted(splits), f"{splits}"
  
imports: import numpy
  import pandas
  import pytest
  from sklearn.linear_model import Lasso
  from sklearn.model_selection import GridSearchCV
  from sklearn.pipeline import Pipeline
  from sklego.model_selection import GroupTimeSeriesSplit
label_desc: Use image node_id 9 for calling a global function with example usage: test_split_points_chronological(valid_cv) without return types