class_docstr: A callback that registers the events that goes through.
class_docstr_tok: ["A","callback","that","registers","the","events","that","goes","through","."]
code: def on_save(self, args, state, control, **kwargs):
      self.events.append("on_save")
  
imports: import shutil
  import tempfile
  import unittest
  from unittest.mock import patch
  from transformers import DefaultFlowCallback, IntervalStrategy, PrinterCallback, ProgressCallback, Trainer, TrainerCallback, TrainingArguments, is_torch_available
  from transformers.testing_utils import require_torch
label_desc: Use image node_id 11 for calling the MyTestTrainerCallback obj's underlying member method code with example usage: obj.on_save(args, state, control) without return types