protected function getDynamicPath($fullPath) {
        // empty string makes FM to use connector path for preview instead of absolute path
        // COMMENTED: due to it prevents to build absolute URL when "serverRoot" is "false" and "fileRoot" is provided
        // as well as "previewUrl" value in the JSON configuration file is set to the correct URL
//        if(empty($this->dynamic_fileroot)) {
//            return '';
//        }
        $path = $this->dynamic_fileroot . '/' . $this->getRelativePath($fullPath);
        return $this->cleanPath($path);
    }