code: def key_device(self) -> str:
      return "device"
  
imports: import glob
  import json
  import logging
  import os
  import subprocess
  import sys
  from typing import Dict, Optional, Sequence
  import monai.bundle
  import torch
  from monai.bundle import ConfigParser
  from monai.data import partition_dataset
  from monai.handlers import CheckpointLoader
  from monailabel.config import settings
  from monailabel.interfaces.datastore import Datastore
  from monailabel.interfaces.tasks.train import TrainTask
  from monailabel.utils.others.class_utils import unload_module
  from monailabel.utils.others.generic import device_list, name_to_device
label_desc: Use image node_id 5 for calling the BundleConstants obj's underlying member method code with example usage: obj.key_device() and returns: str