code: def test_lossy_rt():
      im = roundtrip(test_card, quality_layers=[20])
      assert_image_similar(im, test_card, 2.0)
  
imports: import os
  import re
  from io import BytesIO
  import pytest
  from PIL import Image, ImageFile, Jpeg2KImagePlugin, UnidentifiedImageError, features
  from .helper import assert_image_equal, assert_image_similar, assert_image_similar_tofile, skip_unless_feature
label_desc: Use image node_id 9 for calling a global function with example usage: test_lossy_rt() without return types