private void handleFeatureControlChange() {
        // The feature control maybe have changed. On the active controller cancel or schedule noop
        // record writes accordingly.
        if (isActiveController()) {
            if (featureControl.metadataVersion().isNoOpRecordSupported()) {
                maybeScheduleNextWriteNoOpRecord();
            } else {
                cancelNextWriteNoOpRecord();
            }
        }
    }
Append records to the Raft log. They will be written out asynchronously.

@param log                   The log4j logger.
@param result                The controller result we are writing out.
@param maxRecordsPerBatch    The maximum number of records to allow in a batch.
@param appender              The callback to invoke for each batch. The arguments are last
                             write offset, record list, and the return result is the new
                             last write offset.
@return                      The final offset that was returned from the Raft layer.
metadata/src/main/java/org/apache/kafka/controller/QuorumController.java