public function copyToPublic($path, $overwrite = false)
    {
        $publicPath = realpath($this->getPublicPath());
        $targetFilePath   = $publicPath.DIRECTORY_SEPARATOR.basename($path);
        
        if (($overwrite === true && file_exists($targetFilePath)) || !file_exists($targetFilePath)) {
            if (!copy($path, $targetFilePath)) {
                throw new \RuntimeException("Cannot copy ".basename($path)." to ".$publicPath);
            }
        }
        
        return $targetFilePath;
    }