code: def run(self, pickle_image: bytes):
      parsed = self.parse_image(pickle_image)
      if parsed == b"it is a pickle":
          return True
      if parsed == b"it is not a pickle":
          return False
      raise Exception("Couldn't parse the image")
  
file_path: pytorch-lightning/examples/app/pickle_or_not/app.py
imports: import logging
  from lightning.app import LightningApp, LightningFlow, LightningWork
label_desc: Use image node_id 1 for calling the PickleChecker obj's underlying member method code with example usage: obj.run(pickle_image) and returns: True, False