@Override
        public Map<String, Object> snapshot() {
            Map<String, Object> state = new HashMap<>();
            state.put("CurrentEventQueue", currentEventQueue.getSnapshot());
            state.put("ExpiredEventQueue", expiredEventQueue.getSnapshot());
            return state;
        }
Implementation of {@link WindowProcessor} which represent a Window operating based on a cron expression.
modules/siddhi-core/src/main/java/io/siddhi/core/query/processor/stream/window/CronWindowProcessor.java