public Message<?> preSend(Message<?> message, MessageChannel channel) {
mutable.set(MessageHeaderAccessor.getAccessor(message, MessageHeaderAccessor.class).isMutable());
return message;
}
});
channel.addInterceptor(new ImmutableMessageChannelInterceptor());
StompSubProtocolHandler handler = new StompSubProtocolHandler();
handler.afterSessionStarted(this.session, channel);
TextMessage message = StompTextMessageBuilder.create(StompCommand.CONNECT).build();