code: def test_class_weight(shadow_dec_tree):
      assert shadow_dec_tree.get_class_weight() is None
  
imports: import joblib
  import numpy
  import pytest
  from sklearn.tree import DecisionTreeRegressor, DecisionTreeClassifier
  from dtreeviz.models.sklearn_decision_trees import ShadowSKDTree
label_desc: Use image node_id 7 for calling a global function with example usage: test_class_weight(shadow_dec_tree) without return types