Update some native WebSocket session getters to return basic information after it is closed. It is required for example in SubProtocolWebSocketHandler#afterConnectionEstablished() or StompSubProtocolHandler#afterSessionStarted(). Issue: SPR-11621
Update some native WebSocket session getters to return basic information after it is closed. It is required for example in SubProtocolWebSocketHandler#afterConnectionEstablished() or StompSubProtocolHandler#afterSessionStarted(). Issue: SPR-11621