code: def _load_fp16_scaler(self, ckpt):
      scaler = getattr(self.trainer, "scaler", None)
      scaler_dict = ckpt.get("fp16_scaler", None)
      if scaler is not None and scaler_dict is not None:
          scaler.load_state_dict(scaler_dict)
  
imports: import glob
  import importlib
  import logging
  import os
  import sys
  import warnings
  from typing import Any, Dict
  import torch
  from mmf.common.registry import registry
  from mmf.utils.checkpoint_updater import get_pretrained_state_mapping_checkpoint
  from mmf.utils.configuration import get_mmf_env, load_yaml
  from mmf.utils.distributed import is_main, is_xla, open_if_main, synchronize
  from mmf.utils.download import download_pretrained_model
  from mmf.utils.file_io import PathManager
  from mmf.utils.general import get_current_device, updir
  from mmf.utils.xla import save_xla_ckpt
  from omegaconf import OmegaConf
label_desc: Use image node_id 8 for calling the Checkpoint obj's underlying member method code with example usage: obj._load_fp16_scaler(ckpt) without return types