public long nextPollTimeMs() {
            long next = pollBackoff.backoff(pollCount);
            pollCount++;
            return next;
        }
This class orchestrates and manages the state related to a ZK to KRaft migration. A single event thread is used to
serialize events coming from various threads and listeners.
metadata/src/main/java/org/apache/kafka/metadata/migration/KRaftMigrationDriver.java