@Override
    public long scheduleAtomicAppend(int epoch, OptionalLong requiredBaseOffset, List<T> records) {
        return append(epoch, records, requiredBaseOffset, true);
    }
Poll for new events. This allows the client to handle inbound
requests and send any needed outbound requests.
raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java