code: def get_grapheme_cluster_break_property(value, is_bytes=False):
      
  
      obj = unidata.ascii_grapheme_cluster_break if is_bytes else unidata.unicode_grapheme_cluster_break
  
      if value.startswith('^'):
          negated = value[1:]
          value = '^' + unidata.unicode_alias['graphemeclusterbreak'].get(negated, negated)
      else:
          value = unidata.unicode_alias['graphemeclusterbreak'].get(value, value)
  
      return obj[value]
docs: Get `GRAPHEME CLUSTER BREAK` property.