private boolean fillMaxMsgSizeInB(int maxMsgSizeInB) {
        boolean changed = false;
        int tmpMaxMsgSizeInMB =
                SettingValidUtils.validAndGetMsgSizeBtoMB(maxMsgSizeInB);
        if (this.maxMsgSizeInMB != tmpMaxMsgSizeInMB) {
            changed = true;
            this.maxMsgSizeInMB = tmpMaxMsgSizeInMB;
            this.maxMsgSizeInB =
                    SettingValidUtils.validAndXfeMaxMsgSizeFromMBtoB(tmpMaxMsgSizeInMB);
        }
        return changed;
    }
Serialize field to json format

@param sBuilder   build container
@param isLongName if return field key is long name
@param fullFormat if return full format json
@return   process result
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/master/metamanage/metastore/dao/entity/TopicCtrlEntity.java