code: def tearDownClass(cls):
      del cls.model
  
file_path: tinygrad/test/external/external_test_yolo.py
imports: import unittest
  from pathlib import Path
  import cv2
  from examples.yolov3 import Darknet, infer, show_labels
  from tinygrad.helpers import fetch
label_desc: Use image node_id 2 for calling the TestYOLO obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types