public function __callbackConvertToWpUrlString(tubepress_api_url_UrlInterface $url)
 {
     if ($url->isAbsolute()) {
         return $url->toString();
     }
     if (!isset($this->_urlCache)) {
         $this->_urlCache = new tubepress_internal_collection_Map();
         $this->_urlCache->put('url.base', rtrim($this->_environment->getBaseUrl()->toString(), '/'));
         $this->_urlCache->put('url.user', rtrim($this->_environment->getUserContentUrl()->toString(), '/'));
         $this->_urlCache->put('basename', basename(TUBEPRESS_ROOT));
     }
     $urlAsString = $url->toString();
     $tubePressBaseUrl = $this->_urlCache->get('url.base');
     $userContentUrl = $this->_urlCache->get('url.user');
     $baseName = $this->_urlCache->get('basename');
     $isSystem = false;
     if ($this->_stringUtils->startsWith($urlAsString, "{$tubePressBaseUrl}/web/")) {
         $isSystem = true;
     } else {
         if (!$this->_stringUtils->startsWith($urlAsString, "{$userContentUrl}/")) {
             //this should never happen
             return $urlAsString;
         }
     }
     if ($isSystem) {
         $path = str_replace($tubePressBaseUrl, '', $urlAsString);
         return $this->_wpFunctions->plugins_url($path, "{$baseName}/tubepress.php");
     }
     $path = str_replace($userContentUrl, '', $urlAsString);
     return $this->_wpFunctions->content_url('tubepress-content' . $path);
 }