code: def testConstructWithCustomConfig(self):
      tuner = component.Tuner(
          examples=self.examples,
          transform_graph=self.transform_graph,
          train_args=self.train_args,
          eval_args=self.eval_args,
          module_file="/path/to/module/file",
          custom_config={"key": "value"},
      )
      self._verify_output(tuner)
  
file_path: tfx/tfx/components/tuner/component_test.py
imports: import tensorflow
  from tfx.components.tuner import component
  from tfx.proto import trainer_pb2
  from tfx.proto import tuner_pb2
  from tfx.types import channel_utils
  from tfx.types import standard_artifacts
label_desc: Use image node_id 5 for calling the TunerTest obj's underlying member method code with example usage: obj.testConstructWithCustomConfig() without return types