code: private function createChainVisitor(): HttpProtocolChainVisitor
      {
          $chainVisitors = new HttpProtocolChainVisitor();
          $visitors = clone $this->visitors;
          $priority = 0;
  
          foreach ($visitors as $visitor) {
              $chainVisitors->add($visitor, ++$priority);
          }
  
          return $chainVisitors;
      }
docs: Create chain visitor
  
  @return HttpProtocolChainVisitor