code: def _build_robots_txt_checker(cls, session: AppSession):
          '''Build robots.txt checker.'''
          if session.args.robots:
              robots_txt_pool = session.factory.new('RobotsTxtPool')
              robots_txt_checker = session.factory.new(
                  'RobotsTxtChecker',
                  web_client=session.factory['WebClient'],
                  robots_txt_pool=robots_txt_pool
              )
  
              return robots_txt_checkef _build_robots_txt_checker(cls, session: AppSession):
          '''Build robots.txt checker.'''
          if session.args.robots:
              robots_txt_pool = session.factory.new('RobotsTxtPool')
              robots_txt_checker = session.factory.new(
                  'RobotsTxtChecker',
                  web_client=session.factory['WebClient'],
                  robots_txt_pool=robots_txt_pool
              )
  
              return robots_txt_checker
docs: Build robots.txt checker.