docstr: Called when the validation batch ends.
docstr_tok: ["Called","when","the","validation","batch","ends","."]
code: def on_validation_batch_end(self, **kwargs) -> None:
      """Called when the validation batch ends."""
      for callback in self.callbacks:
          callback.on_validation_batch_end(**kwargs)
  
imports: from abc import ABC
  from typing import List
  from mmf.trainers.callbacks.base import Callback
label_desc: Use image node_id 13 for calling the TrainerCallbackHookMixin obj's underlying member method code with example usage: obj.on_validation_batch_end() without return types