@Override
        public void restore(Map<String, Object> state) {
            expiredEventQueue.clear();
            expiredEventQueue.restore((SnapshotStateList) state.get("ExpiredEventQueue"));
        }
Implementation of {@link WindowProcessor} which represent a Window operating based on external time.
modules/siddhi-core/src/main/java/io/siddhi/core/query/processor/stream/window/ExternalTimeWindowProcessor.java