class_docstr: Base callback class. It defines the interface for callbacks.
class_docstr_tok: ["Base","callback","class",".","It","defines","the","interface","for","callbacks","."]
code: def on_learn_batch_end(self, experience: Experience) -> None:
      pass
  
file_path: ColossalAI/applications/Chat/coati/trainer/callbacks/base.py
imports: from abc import ABC
  from coati.experience_maker import Experience
label_desc: Use image node_id 10 for calling the Callback obj's underlying member method code with example usage: obj.on_learn_batch_end(experience) without return types