public void beginShutdown() {
        log.debug("Beginning shutdown of SnapshotGenerator.");
        this.disabledReason.compareAndSet(null, "we are shutting down");
        eventQueue.beginShutdown("beginShutdown");
    }
The time at which we created the last snapshot.
metadata/src/main/java/org/apache/kafka/image/publisher/SnapshotGenerator.java