@Override
    public void updateLastArrivalTime(long timestamp) {
        StreamPreState state = stateHolder.getState();
        this.lock.lock();
        try {
            ((LogicalStreamPreState) state).lastArrivalTime = timestamp;
        } finally {
            this.lock.unlock();
            stateHolder.returnState(state);
        }
    }
The time defined by 'for' in an absence pattern.
modules/siddhi-core/src/main/java/io/siddhi/core/query/input/stream/state/AbsentLogicalPreStateProcessor.java