code: def save(self, checkpoint_path: str) -> None:
      checkpoint_dir = Path(checkpoint_path)
      checkpoint_dir.mkdir(parents=True, exist_ok=True)
      log.info(f"Created dir for checkpoints. dir={checkpoint_dir}")
      with open(
          checkpoint_dir / f"checkpoint_{self.random_seed}.pt", "w"
      ) as f:
          f.write(f"checkpoint@{datetime.now()}")
  
imports: import logging
  from datetime import datetime
  from pathlib import Path
label_desc: Use image node_id 2 for calling the MyModel obj's underlying member method code with example usage: obj.save(checkpoint_path) without return types