public Builder mergeFrom(com.taobao.metamorphosis.server.transaction.store.TransactionCommands.AppendMessageCommand other) {
        if (other == com.taobao.metamorphosis.server.transaction.store.TransactionCommands.AppendMessageCommand.getDefaultInstance()) return this;
        if (other.hasMessageId()) {
          setMessageId(other.getMessageId());
        }
        if (other.hasPutCommand()) {
          setPutCommand(other.getPutCommand());
        }
        this.mergeUnknownFields(other.getUnknownFields());
        return this;
      }
Protobuf type {@code com.taobao.tddl.dbproxy.protocol.AppendMessageCommand}
metamorphosis-server/src/main/java/com/taobao/metamorphosis/server/transaction/store/TransactionCommands.java