class_docstr: Logs the loss, optimizer LR, and meters. Logs at the end of a phase.
code: def on_start(self, task) -> None:
      logging.info(f"Starting training. Task: {task}")
  
file_path: ClassyVision/classy_vision/hooks/loss_lr_meter_logging_hook.py
imports: import logging
  from typing import Optional
  from classy_vision.generic.distributed_util import get_rank
  from classy_vision.hooks import register_hook
  from classy_vision.hooks.classy_hook import ClassyHook
label_desc: Use image node_id 2 for calling the LossLrMeterLoggingHook obj's underlying member method code with example usage: obj.on_start(task) without return types