code: def test_max_cat(self) -> None:
      self.cputest.run_max_cat("gpu_hist")
  
imports: import sys
  from typing import Any, Dict
  import numpy
  import pytest
  from hypothesis import assume, given, note, settings, strategies
  import xgboost
  from xgboost import testing
  from xgboost.testing.params import cat_parameter_strategy, exact_parameter_strategy, hist_parameter_strategy
  from xgboost.testing.updater import check_categorical_missing, check_categorical_ohe, check_get_quantile_cut, check_init_estimation, check_quantile_loss, train_result
  import test_updaters
label_desc: Use image node_id 9 for calling the TestGPUUpdaters obj's underlying member method code with example usage: obj.test_max_cat() without return types