@Override
  public List<WAL> getWALs() {
    List<WAL> wals = new ArrayList<>(1);
    wals.add(disabled);
    return wals;
  }
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