code: def test_grey_closing_and_opening(self, xp, scp):
      x = testing.shaped_random(self.shape, xp, self.x_dtype)
      return self._filter(xp, scp, x)
  
imports: import numpy
  import pytest
  from cupy import testing
  import cupyx.scipy.ndimage
label_desc: Use image node_id 2 for calling the TestGreyClosingAndOpening obj's underlying member method code with example usage: obj.test_grey_closing_and_opening(xp, scp) and returns: self