If there's no SockJsCookieNeeded or SockJsNoCookieNeeded annotation, the cookie config is taken from sockJsCookie in xitrum.conf.
See SockJsCookieNeeded.
WebSocket is always turn on for SockJS.
WebSocket is always turn on for SockJS. To turn off, use this annotation.
See: https://github.com/swagger-api/swagger-spec/blob/master/versions/2.0.md