code: def xgb_booster() -> xgb.Booster:
      return joblib.load("fixtures/xgb_model_regressor.joblib")
  
file_path: dtreeviz/testing/testlib/models/test_decision_tree_xgb_regressor.py
imports: import joblib
  import numpy
  import pytest
  import xgboost
  from dtreeviz.models.xgb_decision_tree import ShadowXGBDTree
label_desc: Use image node_id 1 for calling a global function with example usage: xgb_booster() and returns: joblib