code: def shrink_defined_pixels(labels, fill, iterations):
      """
      Remove pixels around the perimeter of an object unless
      doing so would change the object’s Euler number `iterations` times.
      Processing stops automatically when there are no more pixels to
      remove.
      """
  
      if fill:
          labels = centrosome.cpmorphology.fill_labeled_holes(labels)
      return centrosome.cpmorphology.binary_shrink(
          labels, iterations=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 2 for calling a global function with example usage: shrink_defined_pixels(labels, fill, iterations) and returns: centrosome