class NeXAS:public ENGINE{
    public:
    NeXAS(){
        
        is_engine_certain=false;
        check_by=CHECK_BY::CUSTOM;
        check_by_target=[](){
            return (Util::CheckFile(L"*.pac")&&(Util::CheckFile(L"Thumbnail.pac")||Util::CheckFile(L"Thumbnail5.pac")));
        };
    }; 
     bool attach_function(); 
};