Spatie\Crawler\CrawlQueue::has PHP Method

    public function has($crawlUrl) : bool
    {
        if ($crawlUrl instanceof Url) {
            $crawlUrl = CrawlUrl::create($crawlUrl);
        }
        if ($this->contains($this->pending, $crawlUrl)) {
            return true;
        }
        if ($this->contains($this->processed, $crawlUrl)) {
            return true;
        }
        return false;
    }

 protected function addAllLinksToCrawlQueue(string $html, Url $foundOnUrl)
 {
     $allLinks = $this->extractAllLinks($html);
     collect($allLinks)->filter(function (Url $url) {
         return $url->hasCrawlableScheme();
     })->map(function (Url $url) {
         return $this->normalizeUrl($url);
     })->filter(function (Url $url) {
         return $this->crawlProfile->shouldCrawl($url);
     })->reject(function ($url) {
         return $this->crawlQueue->has($url);
     })->each(function (Url $url) use($foundOnUrl) {
         $this->crawlQueue->add(CrawlUrl::create($url, $foundOnUrl));
     });
 }