code: def parse_image(image_str: bytes):
      return image_str
  
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 2 for calling the PickleChecker obj's underlying member method code with example usage: obj.parse_image(image_str) and returns: image_str