Function client_async_tls 

pub async fn client_async_tls<R, S>(
    request: R,
    stream: S,
) -> Result<(WebSocketStream<S>, Response<Option<Vec<u8>>>), Error>
where
    R: IntoClientRequest,
    S: Splittable + 'static,
    <S as Splittable>::ReadHalf: AsyncRead + Unpin,
    <S as Splittable>::WriteHalf: AsyncWrite + Unpin,

Available on crate feature ws only.

Creates a WebSocket handshake from a request and a stream, upgrading the stream to TLS if required.