code: def comment(self, text, comment_prefix='#'):
          
          comment = Comment(self._container)
          if not text.startswith(comment_prefix):
              text = "{} {}".format(comment_prefix, text)
          if not text.endswith('\n'):
              text = "{}{}".format(text, '\n')
          comment.add_line(text)
          self._container.structure.insert(self._idx, comment)
          self._idx += 1
          return self
docs: Creates a comment block
  
          Args:
              text (str): content of comment without #
              comment_prefix (str): character indicating start of comment
  
          Returns:
              self for chaining