code: def test_get_node_feature(xgb_tree):
      assert xgb_tree.get_node_feature(3) == -2
      assert xgb_tree.get_node_feature(1) == 0
      assert xgb_tree.get_node_feature(0) == 3
      assert xgb_tree.get_node_feature(6) == -2
      assert xgb_tree.get_node_feature(2) == 4
  
imports: import joblib
  import numpy
  import pytest
  import xgboost
  from dtreeviz.models.xgb_decision_tree import ShadowXGBDTree
label_desc: Use image node_id 8 for calling a global function with example usage: test_get_node_feature(xgb_tree) without return types