code: def test_xgboost_pojo():
      test_booster("gbtree")
      test_booster("dart")
      test_booster("gblinear", 1e-5)
  
imports: import sys
  import os
  from h2o.estimators.xgboost import *
  from tests import pyunit_utils
label_desc: Use image node_id 3 for calling a global function with example usage: test_xgboost_pojo() without return types