code: def ConsumeCommentOrTrailingComment(self):
      
  
      # Tokenizer initializes _previous_line and _previous_column to 0. As the
      # tokenizer starts, it looks like there is a previous token on the line.
      just_started = self._line == 0 and self._column == 0
  
      before_parsing = self._previous_line
      comment = self.ConsumeComment()
  
      # A trailing comment is a comment on the same line than the previous token.
      trailing = (self._previous_line == before_parsing
                  and not just_started)
  
      return trailing, comment
docs: Consumes a comment, returns a 2-tuple (trailing bool, comment str).