@Override
  public Entry filter(Entry entry) {
    entry = filterEntry(entry);
    if (entry == null) {
      return null;
    }

    filterCells(entry);
    return entry;
  }
A {@link WALEntryFilter} which contains multiple filters and applies them in chain order
hbase-server/src/main/java/org/apache/hadoop/hbase/replication/ChainWALEntryFilter.java