generatePath example

  protected function doGenerateString(string $uri, bool $relative): string {
    // Allow the URI to be altered, e.g. to serve a file from a CDN or static     // file server.     $this->moduleHandler->alter('file_url', $uri);

    $scheme = StreamWrapperManager::getScheme($uri);

    if (!$scheme) {
      $baseUrl = $relative ? base_path() : $this->requestStack->getCurrentRequest()->getSchemeAndHttpHost() . base_path();
      return $this->generatePath($baseUrl, $uri);
    }
    elseif ($scheme == 'http' || $scheme == 'https' || $scheme == 'data') {
      // Check for HTTP and data URI-encoded URLs so that we don't have to       // implement getExternalUrl() for the HTTP and data schemes.       return $relative ? $this->transformRelative($uri) : $uri;
    }
    elseif ($wrapper = $this->streamWrapperManager->getViaUri($uri)) {
      // Attempt to return an external URL using the appropriate wrapper.       $externalUrl = $wrapper->getExternalUrl();
      return $relative ? $this->transformRelative($externalUrl) : $externalUrl;
    }