public VirtualHostBuilder build(Object service) {
        service(service);
        virtualHostBuilder.addServiceConfigSetters(this);
        return virtualHostBuilder;
    }
Registers the given service to the {@linkplain VirtualHostBuilder}.

@param service annotated service object to handle incoming requests matching path prefix, which
               can be configured through {@link AnnotatedServiceBindingBuilder#pathPrefix(String)}.
               If path prefix is not set then this service is registered to handle requests matching
               {@code /}
@return {@link VirtualHostBuilder} to continue building {@link VirtualHost}
core/src/main/java/com/linecorp/armeria/server/VirtualHostAnnotatedServiceBindingBuilder.java