@Override
    public boolean equals(Object o) {
        if (o == null || !o.getClass().equals(this.getClass())) return false;
        LogDeltaManifest other = (LogDeltaManifest) o;
        return provenance.equals(other.provenance) &&
                leaderAndEpoch == other.leaderAndEpoch &&
                numBatches == other.numBatches &&
                elapsedNs == other.elapsedNs &&
                numBytes == other.numBytes;
    }
The total size of the records in bytes that we read while creating the delta.
metadata/src/main/java/org/apache/kafka/image/loader/LogDeltaManifest.java