code: public ServerBuilder tls(KeyManagerFactory keyManagerFactory,
                               Consumer<SslContextBuilder> tlsCustomizer) throws SSLException {
  
          defaultVirtualHostBuilderUpdated();
          defaultVirtualHostBuilder.tls(keyManagerFactory, tlsCustomizer);
          return this;
      }
docs: Configures SSL or TLS of the default {@link VirtualHost} from the specified {@code keyManagerFactory}
  and {@code tlsCustomizer}.
  
  @throws IllegalStateException if the default {@link VirtualHost} has been set via
  {@link #defaultVirtualHost(VirtualHost)} already