Código 6

@EnableBinding({Source.class})
public class SubscriptionRequestsProducer {
   private final Source source;

   public SubscriptionRequestsProducer(Source source) {
       this.source = source;
   }

   public void requestApproval(Map<String, Object> subscriptionRequest) {
       source.output().send(MessageBuilder.withPayload(subscriptionRequest).build());
   }
}