code: def run(self):
      with open("work.pkl", "rb") as f:
          work = safe_pickle.load(f)
      assert work.get_test_string() == "Hello from SelfPicklingWork!"
  
file_path: pytorch-lightning/tests/tests_app/utilities/testdata/safe_pickle_app.py
imports: import subprocess
  from pathlib import Path
  from lightning.app import LightningApp, LightningFlow, LightningWork
  from lightning.app.utilities import safe_pickle
label_desc: Use image node_id 1 for calling the WorkThatLoadsPickledWork obj's underlying member method code with example usage: obj.run() without return types