public void addCsmOffsets(long offsetCfm, long offsetFetch) {
        this.cfmOffset = offsetCfm;
        this.inflightOffset = offsetFetch;
    }
The offset snapshot of the consumer group on the partition.
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/broker/offset/OffsetCsmItem.java