public String getNamesrvAddr() {
            return namesrvAddr;
        }
get rocketmq nameserver address.

@return rocketmq nameserver address
shenyu-plugin/shenyu-plugin-logging/shenyu-plugin-logging-rocketmq/src/main/java/org/apache/shenyu/plugin/logging/rocketmq/config/RocketMQLogCollectConfig.java