code: def test_reference_counting(self):
      size = 10
  
      for _ in range(10):
          # Do not save references to the image, only to the access object
          with pytest.warns(DeprecationWarning):
              px = Image.new("L", (size, 1), 0).load()
          for i in range(size):
              # pixels can contain garbage if image is released
              assert px[i, 0] == 0
  
imports: from __future__ import annotations
  import os
  import subprocess
  import sys
  import sysconfig
  import pytest
  from PIL import Image
  from .helper import assert_image_equal, hopper, is_win32
label_desc: Use image node_id 6 for calling the TestCffi obj's underlying member method code with example usage: obj.test_reference_counting() without return types