private S3ObjectsImage getNewS3ObjectsMetadataImage() {
        return s3ObjectsDelta == null ?
            image.objectsMetadata() : s3ObjectsDelta.apply();
    }
Create removal deltas for anything which was in the base image, but which was not
referenced in the snapshot records we just applied.
metadata/src/main/java/org/apache/kafka/image/MetadataDelta.java