code: def choices(cls):
      return cls.__members__.values()
  
imports: import enum
  import functools
  import random
  import threading
  import time
  import grpc
  from tensorboard import version
  from tensorboard.util import tb_logging
label_desc: Use image node_id 2 for calling the ChannelCredsType obj's underlying member method code with example usage: obj.choices(cls) and returns: cls