public static function page($page = null)
    {
        if ($page !== null) {
            self::$_page = $page;
        }
        return self::$_page;
    }
public static function page($page = null)
    {
        if ($page !== null) {
            self::$_page = $page;
        }
        return self::$_page;
    }
public static function page ( $ page = null ) { if ( $ page !== null ) { self :: $ _page = $ page ; } return self :: $ _page ; }
Get or set the current page.

@param null|Page $page
@return null|Page
Get or set the current page .