code: def img(self):
          '''return a cv image for the icon'''
          SlipThumbnail.img(self)
  
          if self.rotation:
              # rotate the image
              mat = cv2.getRotationMatrix2D((self.height//2, self.width//2), -self.rotation, 1.0)
              self._rotated = cv2.warpAffine(self._img, mat, (self.height, self.width))
          else:
              self._rotated = self._img
          return self._rotatef img(self):
          '''return a cv image for the icon'''
          SlipThumbnail.img(self)
  
          if self.rotation:
              # rotate the image
              mat = cv2.getRotationMatrix2D((self.height//2, self.width//2), -self.rotation, 1.0)
              self._rotated = cv2.warpAffine(self._img, mat, (self.height, self.width))
          else:
              self._rotated = self._img
          return self._rotated
docs: return a cv image for the icon