class_docstr: Container holding a list of callbacks.
class_docstr_tok: ["Container","holding","a","list","of","callbacks","."]
code: def set_trainer(self, trainer):
      self.trainer = trainer
      for callback in self.callbacks:
          callback.set_trainer(trainer)
  
imports: import time
  import datetime
  import copy
  import numpy
  from dataclasses import dataclass, field
  from typing import List, Any
  import warnings
label_desc: Use image node_id 3 for calling the CallbackContainer obj's underlying member method code with example usage: obj.set_trainer(trainer) without return types