docs: public void sendMessagesToPushNetwork(@Observes @Dequeue MessageHolderWithTokens msg) {
          final Variant variant = msg.getVariant();
          final UnifiedPushMessage unifiedPushMessage = msg.getUnifiedPushMessage();
          final Collection<String> deviceTokens = msg.getDeviceTokens();
  
          logger.info("Received UnifiedPushMessage from JMS queue, will now trigger the Push Notification delivery for the %s variant ({})", variant.getType().getTypeName(), variant.getVariantID());
          senders.select(new SenderTypeLiteral(variant.getType())).get()
            .sendPushMessage(variant, deviceTokens, unifiedPushMessage, msg.getPushMessageInformation().getId(),
              new SenderServiceCallback(
                variant,
                deviceTokens.size(),
                msg.getPushMessageInformation()
              )
            );
      }