public static function group($group, \Closure $closure)
    {
        self::$group = $group;
        call_user_func($closure, self::getInstance());
        self::$group = null;
    }
public static function group($group, \Closure $closure)
    {
        self::$group = $group;
        call_user_func($closure, self::getInstance());
        self::$group = null;
    }
public static function group ( $ group , \ Closure $ closure ) { self :: $ group = $ group ; call_user_func ( $ closure , self :: getInstance ( ) ) ; self :: $ group = null ; }
Appending route entries to group.

@param string $group
@param \Closure $closure
Appending route entries to group .