code: def sentence_boundary_punctuation(self, txt):
      if hasattr(self.lang, "ReplaceColonBetweenNumbersRule"):
          txt = Text(txt).apply(
              self.lang.ReplaceColonBetweenNumbersRule
          )
      if hasattr(self.lang, "ReplaceNonSentenceBoundaryCommaRule"):
          txt = Text(txt).apply(
              self.lang.ReplaceNonSentenceBoundaryCommaRule
          )
      # retain exclamation mark if it is an ending character of a given text
      txt = re.sub(r"&ᓴ&$", "!", txt)
      txt = [
          m.group()
          for m in re.finditer(self.lang.SENTENCE_BOUNDARY_REGEX, txt)
      ]
      return txt
  
imports: import re
  from pysbd.utils import Text
  from pysbd.lists_item_replacer import ListItemReplacer
  from pysbd.exclamation_words import ExclamationWords
  from pysbd.between_punctuation import BetweenPunctuation
  from pysbd.abbreviation_replacer import AbbreviationReplacer
label_desc: Use image node_id 17 for calling the Processor obj's underlying member method code with example usage: obj.sentence_boundary_punctuation(txt) and returns: txt