TODO: checkLocalTransaction.

WithCompressLevel set compress level (0~9) 0 stands for best speed 9 stands for best compression ratio.

WithCompressMsgBodyOverHowmuch set compression threshold.

WithGroupName set group name address.

WithNameServer set NameServer address, only support one NameServer cluster in alpha2.

WithNameServerDomain set NameServer domain.

WithNamespace set the namespace of producer.

WithNsResolver set nameserver resolver to fetch nameserver addr.

WithRetry return a Option that specifies the retry times when send failed.

WithTrace support rocketmq trace: https://github.com/apache/rocketmq/wiki/RIP-6-Message-Trace.

WithUnitName set the name of specified unit.