1. @DomName('ServiceWorkerRegistration.update')
  2. @DocsEditable()
  3. @Experimental()
void update()

Source 

@DomName('ServiceWorkerRegistration.update')
@DocsEditable()
@Experimental() // untriaged
void update() =>
    _blink.BlinkServiceWorkerRegistration.instance.update_Callback_0_(this);