@Override
    public void sync() {
      if (!this.listeners.isEmpty()) {
        for (WALActionsListener listener : this.listeners) {
          listener.postSync(0L, 0);
        }
      }
    }
No-op implementation of {@link WALProvider} used when the WAL is disabled. Should only be used
when severe data loss is acceptable.
hbase-server/src/main/java/org/apache/hadoop/hbase/wal/DisabledWALProvider.java