@Override
    public String toString() {
        return "S3Object{" +
            "objectId=" + objectId +
            ", objectSize=" + objectSize +
            ", timestamp=" + timestamp +
            ", s3ObjectState=" + s3ObjectState +
            ", attributes=" + attributes +
            '}';
    }
The timestamp of the object:
- If state = PREPARED, it's the deadline timestamp.
- If state = MARK_DESTROYED, it's the mark destroyed timestamp.
metadata/src/main/java/org/apache/kafka/metadata/stream/S3Object.java