public static function includePath($paths) {
        $current = array(get_include_path());

        if (is_array($paths)) {
            $current = array_merge($current, $paths);
        } else {
            $current[] = $paths;
        }

        $path = implode(static::DELIMITER, $current);

        set_include_path($path);

        return $path;
    }