code: def get_checkpoint_best():
      """Retrieves the path to the best checkpoint file."""
      return os.path.join(cfg.OUT_DIR, "model.pyth")
  
file_path: pycls/pycls/core/checkpoint.py
imports: import os
  import pycls.core.distributed
  import torch
  from pycls.core.config import cfg
  from pycls.core.io import pathmgr
  from pycls.core.net import unwrap_model
label_desc: Use image node_id 3 for calling a global function with example usage: get_checkpoint_best() and returns: os