def pr_comment(self, comment):
        pr_threads = self.azure_git_client.get_threads(self.azure_repo_id, self.azure_pull_request_id)
        existing_thread = None
        existing_comment = None
        for pr_thread in pr_threads:
            for pr_thread_comment in pr_thread.comments:
                if pr_thread_comment.content and globals.comment_on_pr_header in pr_thread_comment.content:
                    existing_thread = pr_thread
                    existing_comment = pr_thread_comment

        comments_markdown = f"# {globals.comment_on_pr_header}\n{comment}"

        if len(comments_markdown) > 65535:
            comments_markdown = comments_markdown[:65535]

        if existing_comment is not None:
            globals.printdebug(f"DEBUG: Update/edit existing comment for PR #{self.azure_pull_request_id}\n"
                               f"{comments_markdown}")

            pr_thread_comment = Comment()
            pr_thread_comment.parent_comment_id = 0
            pr_thread_comment.content = comments_markdown
            pr_thread_comment.comment_type = 1

            retval = self.azure_git_client.update_comment(pr_thread_comment, self.azure_repo_id,
                                                          self.azure_pull_request_id, existing_thread.id,
                                                          existing_comment.id)

            globals.printdebug(f"DEBUG: Updated thread, retval={retval}")
        else:
            globals.printdebug(f"DEBUG: Create new thread for PR #{self.azure_pull_request_id}")

            pr_thread_comment = Comment()
            pr_thread_comment.parent_comment_id = 0
            pr_thread_comment.content = comments_markdown
            pr_thread_comment.comment_type = 1

            pr_thread = GitPullRequestCommentThread()
            pr_thread.comments = [pr_thread_comment]
            pr_thread.status = 1

            retval = self.azure_git_client.create_thread(pr_thread, self.azure_repo_id, self.azure_pull_request_id)

            globals.printdebug(f"DEBUG: Created thread, retval={retval}")
        return True