code: public function retry()
      {
          $frames = $this->page->getFrameFocus();
          if (count($frames) > 0) {
              $this->loadFrame(
                      $frames,
                      $this->page->getUrl(),
                      $this->page->getRequestData());
  
              return $this->page->getRaw();
          }
          if ($url = $this->history->getUrl()) {
              $this->page = $this->fetch($url, $this->history->getParameters());
  
              return $this->page->getRaw();
          }
  
          return false;
      }
docs: Equivalent to hitting the retry button on the browser.
  Will attempt to repeat the page fetch.
  If there is no history to repeat it will give false.
  
  @return string/boolean   Content if fetch succeeded else false.