code: def test_image_mask_1(self, mode):
      im = Image.new(mode, (200, 200), "white")
      im2 = getattr(self, "gradient_" + mode)
  
      self.assert_9points_paste(
          im,
          im2,
          self.mask_1,
          [
              (255, 255, 255, 255),
              (255, 255, 255, 255),
              (127, 254, 127, 0),
              (255, 255, 255, 255),
              (255, 255, 255, 255),
              (191, 190, 63, 64),
              (127, 0, 127, 254),
              (191, 64, 63, 190),
              (255, 255, 255, 255),
          ],
      )
  
imports: from __future__ import annotations
  import pytest
  from PIL import Image
  from .helper import CachedProperty, assert_image_equal
label_desc: Use image node_id 11 for calling the TestImagingPaste obj's underlying member method code with example usage: obj.test_image_mask_1(mode) without return types