public static function getActiveTheme() {
        if (static::$_activeTheme === null) {
            foreach (static::getThemes() as $index => $theme) {
                if ($theme['active']) {
                    return static::$_activeTheme = [$index => $theme];
                }
            }
            return false;
        }
    	return static::$_activeTheme;
    }