code: def test_lab_srgb():
      psRGB = ImageCms.createProfile("sRGB")
      pLab = ImageCms.createProfile("LAB")
      t = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB")
  
      with Image.open("Tests/images/hopper.Lab.tif") as img:
          img_srgb = ImageCms.applyTransform(img, t)
  
      # img_srgb.save('temp.srgb.tif') # visually verified vs ps.
  
      assert_image_similar(hopper(), img_srgb, 30)
      assert img_srgb.info["icc_profile"]
  
      profile = ImageCmsProfile(BytesIO(img_srgb.info["icc_profile"]))
      assert "sRGB" in ImageCms.getProfileDescription(profile)
  
imports: import datetime
  import os
  import re
  import shutil
  from io import BytesIO
  import pytest
  from PIL import Image, ImageMode, features
  from .helper import assert_image, assert_image_equal, assert_image_similar, assert_image_similar_tofile, hopper
label_desc: Use image node_id 20 for calling a global function with example usage: test_lab_srgb() without return types