code: def latest_checkpoint(checkpoint_dir: str) -> str:
      from .callbacks.model_checkpoint import ModelCheckpoint
  
      checkpoint_path = ModelCheckpoint.get_latest_checkpoint(
          checkpoint_dir
      )
      return checkpoint_path
  
imports: import logging
  from typing import TYPE_CHECKING, Union, Optional, Callable, Dict, List
label_desc: Use image node_id 3 for calling the Estimator obj's underlying member method code with example usage: obj.latest_checkpoint(checkpoint_dir) and returns: checkpoint_path