code: def get_border(border, size):
      i = 1
      while size - border // i <= border // i:
          i *= 2
      return border // i
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import random
  import math
  import cv2
label_desc: Use image node_id 21 for calling a global function with example usage: get_border(border, size) and returns: unknown