@Override
    public ServerBuilder service(Route route, HttpService service) {
        requireNonNull(route, "route");
        requireNonNull(service, "service");
        warnIfServiceHasMultipleRoutes(route.patternString(), service);
        virtualHostTemplate.service(route, service);
        return this;
    }
Binds the specified {@link HttpService} at the specified {@link Route} of the default
{@link VirtualHost}.
core/src/main/java/com/linecorp/armeria/server/ServerBuilder.java