code: def test_get_thresholds(shadow_dec_tree: ShadowLightGBMTree):
      thresholds = shadow_dec_tree.get_thresholds()
      assert thresholds[0] == 0
      assert thresholds[1] == 2.5
      assert thresholds[6] == -1
      assert thresholds[8] == 1.5
      assert thresholds[13] == 7.91
      assert thresholds[17] == 1.5
      assert thresholds[22] == -1
  
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 8 for calling a global function with example usage: test_get_thresholds(shadow_dec_tree) without return types