public function see($ID)
    {
        $member = Member::currentUser();
        if (!$member) {
            return false;
        }

        if ($ID) {
            $notification = InternalNotification::get()
                ->filter([
                    'ID' => $ID,
                    'ToID' => $member->ID
                ])->first();
            if ($notification) {
                if (!$notification->IsSeen) {
                    $notification->IsSeen = true;
                    $notification->write();
                }
                return true;
            }
        }
        return false;
    }