code: def replyToComment(self, repo_user, repo_name, pull_number,
                         body, in_reply_to):
          
          return self.api.makeRequest(
              ["repos", repo_user, repo_name,
               "pulls", str(pull_number), "comments"],
              method="POST",
              data=dict(body=body,
                        in_reply_to=in_reply_to))
docs: POST /repos/:owner/:repo/pulls/:number/comments
  
          Like create, but reply to an existing comment.
  
          :param body: The text of the comment.
          :param in_reply_to: The comment ID to reply to.