code: def find_unpickable_doc(dict_of_dict):
      """Look for a dictionary that cannot be pickled."""
      for name, collection in dict_of_dict.items():
          documents = collection.find()
  
          for doc in documents:
              try:
                  pickle.dumps(doc)
  
              except (PicklingError, AttributeError):
                  return name, doc
  
      return None, None
  
imports: import logging
  import os
  import pickle
  from contextlib import contextmanager
  from pickle import PicklingError
  import psutil
  from filelock import FileLock, SoftFileLock, Timeout
  import orion.core
  from orion.core.io.database import Database, DatabaseTimeout
  from orion.core.io.database.ephemeraldb import EphemeralDB
label_desc: Use image node_id 1 for calling a global function with example usage: find_unpickable_doc(dict_of_dict) and returns: None,  None, name,  doc