code: def test_alpha_premult_resize(self):
      def op(im, sz):
          return im.resize(sz, Image.Resampling.BILINEAR)
  
      self._test_alpha_premult(op)
  
imports: from __future__ import annotations
  import math
  import pytest
  from PIL import Image, ImageTransform
  from .helper import assert_image_equal, assert_image_similar, hopper
label_desc: Use image node_id 9 for calling the TestImageTransform obj's underlying member method code with example usage: obj.test_alpha_premult_resize() and returns: im