code: def on_training_start(self) -> None:
      logging.debug("starting training")
      self.training_started_times += 1
  
file_path: determined/harness/tests/experiment/fixtures/pytorch_counter_callback.py
imports: import logging
  from typing import Any, Dict
  from determined import pytorch
label_desc: Use image node_id 6 for calling the Counter obj's underlying member method code with example usage: obj.on_training_start() without return types