this.dirty = dirty;
        }

        @Override
        public boolean isDirty() {
            return dirty;
        }

        @Override
        public boolean canDetectChanges() {
            return false;
        }

        @Override
        public boolean isInInitialState() {
            return false;
        }

        @Override
        public LockState beforeUpdate() {

        }

        @Override
        public boolean isDirty() {
            return sequenceNumber == 0 || sequenceNumber != originalSequenceNumber;
        }

        @Override
        public boolean canDetectChanges() {
            return true;
        }

        @Override
        public boolean isInInitialState() {
            return originalSequenceNumber <= 0;
        }

        @Override

     */
    FileLockManager.LockMode getMode();

    /**
     * An immutable snapshot of the state of a lock.
     */
    interface State {
        boolean canDetectChanges();
        boolean isInInitialState();
        boolean hasBeenUpdatedSince(State state);
    }

        @Override
        public boolean requiresInitialization(FileLock lock) {
            if (!lock.getUnlockedCleanly()) {
                if (lock.getState().canDetectChanges() && !lock.getState().isInInitialState()) {
                    LOGGER.warn("Invalidating {} as it was not closed cleanly.", DefaultPersistentDirectoryCache.this);
                }
                return true;
            }