public function appUploads($path = '', $checkIfExists = false)
    {
        $appUploadsDir = getcwd() . $this->getRelativeAppUploadsDir();
        if ($checkIfExists) {
            return realpath($appUploadsDir . DS . $path);
        }
        if (empty($path)) {
            return $appUploadsDir;
        }
        return $appUploadsDir . DS . $this->normalizePath($path);
    }