@Override
    public String toString() {
        return "FeaturesDelta(" +
            "changes=" + changes +
            ", metadataVersionChange=" + metadataVersionChange +
            ", zkMigrationStateChange=" + zkMigrationStateChange +
            ')';
    }
Represents changes to the cluster in the metadata image.
metadata/src/main/java/org/apache/kafka/image/FeaturesDelta.java