Annotation for mapping a {@link Message} onto message-handling methods by matching to the message destination. This annotation can also be used on the type-level in which case it defines a common destination prefix or pattern for all method-level annotations including method-level {@link org.springframework.messaging.simp.annotation.SubscribeMapping @SubscribeMapping} annotations.
Annotation that indicates a method's return value should be converted to a {@link Message} if necessary and sent to the specified destination.