code: def test_registered_extensions_uninitialized(self):
      # Arrange
      Image._initialized = 0
      extension = Image.EXTENSION
      Image.EXTENSION = {}
  
      # Act
      Image.registered_extensions()
  
      # Assert
      assert Image._initialized == 2
  
      # Restore the original state and assert
      Image.EXTENSION = extension
      assert Image.EXTENSION
  
imports: import io
  import os
  import shutil
  import sys
  import tempfile
  import pytest
  from PIL import Image, ImageDraw, ImagePalette, UnidentifiedImageError
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar_tofile, assert_not_all_same, hopper, is_win32, mark_if_feature_version, skip_unless_feature
label_desc: Use image node_id 27 for calling the TestImage obj's underlying member method code with example usage: obj.test_registered_extensions_uninitialized() without return types