code: def test_setup(ray_start_4_cpus):
      def check_setup(self):
          assert self._has_setup
  
      class DummyTrainerWithSetup(DummyTrainer):
          def setup(self):
              self._has_setup = True
  
      trainer = DummyTrainerWithSetup(check_setup)
      trainer.fit()
  
imports: import logging
  import tempfile
  import pytest
  import ray
  from ray import train, tune
  from ray.air.constants import MAX_REPR_LENGTH
  from ray.data.context import DataContext
  from ray.train import Checkpoint, ScalingConfig
  from ray.train.gbdt_trainer import GBDTTrainer
  from ray.train.trainer import BaseTrainer
  from ray.util.placement_group import get_current_placement_group
label_desc: Use image node_id 6 for calling a global function with example usage: test_setup(ray_start_4_cpus) without return types