Could not find `proto` in `tokio_tls` 0.1.4

Hello,
I would like run a https server with tokio_tls and I must use proto struct for this.
Unfortunately compile time compiler shows following error :

let proto = tokio_tls::proto::Server::new(hyper::server::conn::Http::new(), tls_cx);
-------------------------- ^^^^^ Could not find proto in `tokio_tls