code: def index_of_least_significant_zero_bit(value):
      index = 1
      while (value & 1) != 0:
          value >>= 1
          index += 1
  
      return index
  
imports: import math
  import sys
  import numpy
  from .directions import directions
label_desc: Use image node_id 2 for calling a global function with example usage: index_of_least_significant_zero_bit(value) and returns: index