Fix visibility of Extensions.extended
Fix visibility of Extensions.extended

nuclearsandwich/virtus,reevoo/virtus,XescuGC/virtus,faucct/virtus,macressler/virtus,mallikarjunayaddala/virtus,kristianmandrup/virtus,JustMikey/virtus,dslh/virtus,solnic/virtus,artemeff/virtus,hapiben/virtus,baojjeu/virtus