code: def test_get_node_nsamples(shadow_dec_tree):
      assert shadow_dec_tree.get_node_nsamples(0) == 712
      assert shadow_dec_tree.get_node_nsamples(3) == 110
      assert shadow_dec_tree.get_node_nsamples(4) == 56
      assert shadow_dec_tree.get_node_nsamples(7) == 115
      assert shadow_dec_tree.get_node_nsamples(13) == 340
      assert shadow_dec_tree.get_node_nsamples(19) == 175
      assert shadow_dec_tree.get_node_nsamples(21) == 86
  
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 7 for calling a global function with example usage: test_get_node_nsamples(shadow_dec_tree) without return types