code: def run(self):
      model: DummyModel = self.load("model")
      data = self.load_data_frame("data_a")
      data["applied"] = data["x"].apply(model.apply)
      data["y"] = data["applied"].apply(model.apply)
      self.dump(data)
  
imports: import logging
  import unittest
  from unittest.mock import patch
  import luigi
  import pandas
  import gokart
label_desc: Use image node_id 2 for calling the DummyWorkFlowWithError obj's underlying member method code with example usage: obj.run() without return types