code: def test_get_min_samples_leaf(shadow_dec_tree: ShadowLightGBMTree):
      assert shadow_dec_tree.get_min_samples_leaf() == 20
  
file_path: dtreeviz/testing/testlib/models/test_decision_tree_lightgbm_classifier.py
imports: import lightgbm
  import pytest
  from dtreeviz.models.lightgbm_decision_tree import ShadowLightGBMTree
  import numpy
label_desc: Use image node_id 15 for calling a global function with example usage: test_get_min_samples_leaf(shadow_dec_tree) without return types