public <T extends Message> SendResult syncSend(String destination, Collection<T> messages) {
        return syncSend(destination, messages, producer.getSendMsgTimeout());
    }
syncSend batch messages

@param destination formats: `topicName:tags`
@param messages Collection of {@link org.springframework.messaging.Message}
@return {@link SendResult}
rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/core/RocketMQTemplate.java