code: def _add_comments(
          self,
          comments: Optional[Sequence[str]],
          original_string: str = ""
      ) -> str:
          
          if self.config['ignore_comments']:
              return self._strip_comments(original_string)[0]
  
          if not comments:
              return original_string
          else:
              return "{0}{1} {2}".format(self._strip_comments(original_string)[0],
                                         self.config['comment_prefix'],
                                         "; ".join(comments))
docs: Returns a string with comments added if ignore_comments is not set.