Aerys\Root::__construct PHP Method

    public function __construct(string $root, file\Driver $filesystem = null)
    {
        $root = \str_replace("\\", "/", $root);
        if (!(\is_readable($root) && \is_dir($root))) {
            throw new \DomainException("Document root requires a readable directory");
        }
        $this->root = \rtrim(\realpath($root), "/");
        $this->filesystem = $filesystem ?: file\filesystem();
        $this->multipartBoundary = \uniqid("", true);
        $this->cacheWatcher = amp\repeat(function () {
            $this->now = $now = time();
            foreach ($this->cacheTimeouts as $path => $timeout) {
                if ($now <= $timeout) {
                    break;
                }
                $fileInfo = $this->cache[$path];
                unset($this->cache[$path], $this->cacheTimeouts[$path]);
                $this->bufferedFileCount -= isset($fileInfo->buffer);
                $this->cacheEntryCount--;
            }
        }, 1000, $options = ["enable" => false]);
    }