code: def test_segmentation_size_is_0(self, mock_msf):
      def _side_effect(image, sp, sr, dst):
          dst[...] = image
  
      mock_msf.side_effect = _side_effect
      image = np.arange(4 * 4 * 3).astype(np.uint8).reshape((4, 4, 3))
  
      _ = iaa.stylize_cartoon(image, segmentation_size=0.0)
  
      assert mock_msf.call_count == 0
  
imports: from __future__ import print_function, division, absolute_import
  import sys
  import numpy
  import cv2
  import imgaug
  from imgaug import augmenters
  from imgaug import random
  from imgaug.testutils import reseed, runtest_pickleable_uint8_img
  import imgaug.augmenters.color
  import imgaug.augmenters.artistic
label_desc: Use image node_id 6 for calling the Test_stylize_cartoon obj's underlying member method code with example usage: obj.test_segmentation_size_is_0(mock_msf) without return types