@Override
    public String toString() {
        return "IncrementalSnapshot{" +
                "incrementalState=" + (incrementalState != null) +
                ", incrementalStateBase=" + (incrementalStateBase != null) +
                ", periodicState=" + (periodicState != null) +
                '}';
    }
The class which represents the serialized incremental snapshot.
modules/siddhi-core/src/main/java/io/siddhi/core/util/snapshot/IncrementalSnapshot.java