View.php
public static function unVersion($uri)
    {
        if (!\defined('SERVER_ROOT')) {
            return DS . $uri;
        }
        if (preg_match('#^(.*)\.[\d]{10}\.(css|js)#', $uri, $matches, PREG_OFFSET_CAPTURE)) {

            $uri = trim($matches[1][0] . '.' . $matches[2][0], '/');

            if (file_exists(APP_ROOT . $uri)) {
                self::sendResource($uri, $matches[2][0]);
            }
            if (file_exists(TEMPLATE_ROOT . $uri)) {
                self::sendResource(TEMPLATE_ROOT . $uri, $matches[2][0]);
            }
            if (file_exists(COMPOSER_ROOT . $uri)) {
                self::sendResource(COMPOSER_ROOT . $uri, $matches[2][0]);
            }
        }
        return false;
    }
public static function unVersion($uri)
    {
        if (!\defined('SERVER_ROOT')) {
            return DS . $uri;
        }
        if (preg_match('#^(.*)\.[\d]{10}\.(css|js)#', $uri, $matches, PREG_OFFSET_CAPTURE)) {

            $uri = trim($matches[1][0] . '.' . $matches[2][0], '/');

            if (file_exists(APP_ROOT . $uri)) {
                self::sendResource($uri, $matches[2][0]);
            }
            if (file_exists(TEMPLATE_ROOT . $uri)) {
                self::sendResource(TEMPLATE_ROOT . $uri, $matches[2][0]);
            }
            if (file_exists(COMPOSER_ROOT . $uri)) {
                self::sendResource(COMPOSER_ROOT . $uri, $matches[2][0]);
            }
        }
        return false;
    }
Given a file versioned by file's mtime, i.e. /css/base.1221534296.css.
return the requested file with proper headers, i.e. /css/base.css.

@param $uri
file to be loaded.  Must be an absolute path (i.e.
starting with slash).
@return mixed  file to be loaded.