code: def __contains__(self, x: object) -> bool:
      return False
  
imports: import signal
  import typing
  from typing import Optional, Tuple, Any, Collection
  from labml import tracker, logger, experiment, monit
  from labml.configs import BaseConfigs, meta_config, option
  from labml.internal.monitor import Loop
  from labml.logger import Text
label_desc: Use image node_id 5 for calling the TrainingLoopIterator obj's underlying member method code with example usage: obj.__contains__(x) and returns: False