code: def expand_defined_pixels(labels, iterations):
      """
      Expand each object by adding background pixels
      adjacent to the image `iterations` times. Processing stops
      automatically if there are no more background pixels.
      """
      return expand(labels, iterations)
  
imports: from typing import Literal
  import centrosome.cpmorphology
  import numpy
  import scipy.ndimage
  import skimage.morphology
  import mahotas
label_desc: Use image node_id 8 for calling a global function with example usage: expand_defined_pixels(labels, iterations) and returns: expand