flight\core\Loader::loadClass PHP Method

    public static function loadClass($class)
    {
        $class_file = str_replace(array('\\', '_'), '/', $class) . '.php';
        foreach (self::$dirs as $dir) {
            $file = $dir . '/' . $class_file;
            if (file_exists($file)) {
                require $file;
                return;
            }
        }
    }