code: def download_yolov5n_model(destination_path: Optional[str] = None):
      if destination_path is None:
          destination_path = Yolov5TestConstants.YOLOV5N_MODEL_PATH
  
      Path(destination_path).parent.mkdir(parents=True, exist_ok=True)
  
      if not path.exists(destination_path):
          urllib.request.urlretrieve(
              Yolov5TestConstants.YOLOV5N_MODEL_URL,
              destination_path,
          )
  
imports: import urllib.request
  from os import path
  from pathlib import Path
  from typing import Optional
label_desc: Use image node_id 1 for calling a global function with example usage: download_yolov5n_model(destination_path) without return types